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Climate and Average Weather Year Round at Greeley-Weld County Airport Colorado, United States

At Greeley-Weld County Airport, the summers are hot and mostly clear and the winters are freezing, snowy, and partly cloudy. Over the course of the year, the temperature typically varies from 14°F to 89°F and is rarely below -2°F or above 98°F.

Based on the tourism score, the best time of year to visit Greeley-Weld County Airport for warm-weather activities is from mid June to late August.

Climate at Greeley-Weld County Airport

very coldcoldcoolwarmhotwarmcoolcoldJanFebMarAprMayJunJulAugSepOctNovDecNowNow75%75%52%52%clearovercastprecipitation: 1.9 inprecipitation: 1.9 in0.3 in0.3 inmuggy: 0%muggy: 0%0%0%drydrytourism score: 6.7tourism score: 6.70.10.1
Greeley-Weld County Airport weather by month. Click on each chart for more information.

The hot season lasts for 3.4 months, from June 3 to September 15, with an average daily high temperature above 79°F. The hottest month of the year at Greeley-Weld County Airport is July, with an average high of 88°F and low of 58°F.

The cold season lasts for 3.1 months, from November 20 to February 24, with an average daily high temperature below 49°F. The coldest month of the year at Greeley-Weld County Airport is December, with an average low of 16°F and high of 41°F.

Average High and Low Temperature at Greeley-Weld County Airport

Average High and Low Temperature at Greeley-Weld County AirporthotcoldcoldJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FDec 2939°FDec 2939°FJul 989°FJul 989°F14°F14°F58°F58°FJun 379°FJun 379°FSep 1579°FSep 1579°FFeb 2449°FFeb 2449°F50°F50°F47°F47°F23°F23°F21°F21°FNowNow
The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.
AverageJanFebMarAprMayJunJulAugSepOctNovDec
High 41°F46°F56°F64°F73°F83°F88°F86°F78°F65°F51°F41°F
Temp. 26°F30°F40°F48°F57°F67°F72°F70°F61°F48°F35°F26°F
Low 15°F19°F27°F35°F45°F54°F58°F55°F46°F35°F24°F16°F

The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Average Hourly Temperature at Greeley-Weld County Airport

Average Hourly Temperature at Greeley-Weld County AirportJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMNowNowfreezingfreezingfreezingfreezingvery coldvery coldcoldcoldcoolcomfortablewarmhotcomfortable
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Göreme, Turkey (6,411 miles away); Bījār, Iran (6,886 miles); and Borūjen, Iran (7,211 miles) are the far-away foreign places with temperatures most similar to Greeley-Weld County Airport (view comparison).

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At Greeley-Weld County Airport, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.

The clearer part of the year at Greeley-Weld County Airport begins around June 2 and lasts for 4.8 months, ending around October 28.

The clearest month of the year at Greeley-Weld County Airport is September, during which on average the sky is clear, mostly clear, or partly cloudy 73% of the time.

The cloudier part of the year begins around October 28 and lasts for 7.1 months, ending around June 2.

The cloudiest month of the year at Greeley-Weld County Airport is March, during which on average the sky is overcast or mostly cloudy 47% of the time.

Cloud Cover Categories at Greeley-Weld County Airport

Cloud Cover Categories at Greeley-Weld County AirportclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Jul 175%Jul 175%Mar 352%Mar 352%Jun 263%Jun 263%Oct 2864%Oct 2864%NowNowclearmostly clearpartly cloudymostly cloudyovercast
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.
FractionJanFebMarAprMayJunJulAugSepOctNovDec
Cloudier 44%47%47%47%43%30%28%30%27%32%41%43%
Clearer 56%53%53%53%57%70%72%70%73%68%59%57%

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days at Greeley-Weld County Airport varies throughout the year.

The wetter season lasts 4.8 months, from April 5 to August 31, with a greater than 17% chance of a given day being a wet day. The month with the most wet days at Greeley-Weld County Airport is May, with an average of 8.1 days with at least 0.04 inches of precipitation.

The drier season lasts 7.2 months, from August 31 to April 5. The month with the fewest wet days at Greeley-Weld County Airport is January, with an average of 2.0 days with at least 0.04 inches of precipitation.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation at Greeley-Weld County Airport changes throughout the year.

Rain alone is the most common for 9.1 months, from February 18 to November 22. The month with the most days of rain alone at Greeley-Weld County Airport is May, with an average of 7.9 days.

Snow alone is the most common for 2.9 months, from November 22 to February 18. The month with the most days of snow alone at Greeley-Weld County Airport is December, with an average of 1.3 days.

Daily Chance of Precipitation at Greeley-Weld County Airport

Daily Chance of Precipitation at Greeley-Weld County AirportsnowrainsnowJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%May 2428%May 2428%Jan 116%Jan 116%Feb 188%Feb 188%Nov 2210%Nov 2210%Apr 517%Apr 517%Aug 3117%Aug 3117%NowNowrainsnowmixed
The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).
Days ofJanFebMarAprMayJunJulAugSepOctNovDec
Rain 0.4d0.9d1.9d4.8d7.9d6.7d7.6d6.6d4.4d3.3d1.5d0.4d
Mixed 0.3d0.5d1.0d0.8d0.2d0.0d0.0d0.0d0.1d0.5d0.8d0.4d
Snow 1.2d1.0d0.6d0.3d0.0d0.0d0.0d0.0d0.0d0.3d0.8d1.3d
Any 2.0d2.3d3.5d5.9d8.1d6.7d7.6d6.6d4.6d4.1d3.1d2.1d

To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Greeley-Weld County Airport experiences some seasonal variation in monthly rainfall.

The rainy period of the year lasts for 7.4 months, from March 16 to October 29, with a sliding 31-day rainfall of at least 0.5 inches. The month with the most rain at Greeley-Weld County Airport is May, with an average rainfall of 1.9 inches.

The rainless period of the year lasts for 4.6 months, from October 29 to March 16. The month with the least rain at Greeley-Weld County Airport is December, with an average rainfall of 0.1 inches.

Average Monthly Rainfall at Greeley-Weld County Airport

Average Monthly Rainfall at Greeley-Weld County AirportrainJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in1 in1 in2 in2 in3 in3 in4 in4 inMay 161.9 inMay 161.9 inDec 230.1 inDec 230.1 inJul 251.4 inJul 251.4 inMar 160.5 inMar 160.5 inOct 290.5 inOct 290.5 inNowNow
The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average snowfall.
JanFebMarAprMayJunJulAugSepOctNovDec
Rainfall 0.1″0.2″0.5″1.2″1.9″1.4″1.4″1.1″1.0″0.7″0.3″0.1″

Snowfall

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year. Greeley-Weld County Airport experiences some seasonal variation in monthly snowfall.

The snowy period of the year lasts for 6.2 months, from October 12 to April 20, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow at Greeley-Weld County Airport is March, with an average snowfall of 2.3 inches.

The snowless period of the year lasts for 5.8 months, from April 20 to October 12. The least snow falls around July 14, with an average total accumulation of 0.0 inches.

Average Monthly Snowfall at Greeley-Weld County Airport

Average Monthly Snowfall at Greeley-Weld County AirportsnowsnowJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in1 in1 in2 in2 in3 in3 in4 in4 in5 in5 in6 in6 inMar 182.3 inMar 182.3 inJul 140.0 inJul 140.0 inDec 142.2 inDec 142.2 inJan 142.0 inJan 142.0 inOct 121.0 inOct 121.0 inApr 201.0 inApr 201.0 inNowNow
The average snowfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average rainfall.
JanFebMarAprMayJunJulAugSepOctNovDec
Snowfall 2.0″2.0″2.3″1.3″0.2″0.0″0.0″0.0″0.1″1.2″2.0″2.2″

The length of the day at Greeley-Weld County Airport varies significantly over the course of the year. In 2024, the shortest day is December 21, with 9 hours, 17 minutes of daylight; the longest day is June 20, with 15 hours, 4 minutes of daylight.

Hours of Daylight and Twilight at Greeley-Weld County Airport

Hours of Daylight and Twilight at Greeley-Weld County AirportJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 8 minMar 1912 hr, 8 minMar 1915 hr, 4 minJun 2015 hr, 4 minJun 2012 hr, 11 minSep 2212 hr, 11 minSep 229 hr, 17 minDec 219 hr, 17 minDec 21nightnightdayNowNow
The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.
Hours ofJanFebMarAprMayJunJulAugSepOctNovDec
Daylight 9.7h10.7h12.0h13.3h14.5h15.0h14.7h13.7h12.4h11.1h9.9h9.3h

The earliest sunrise is at 5:27 AM on June 13, and the latest sunrise is 2 hours, 3 minutes later at 7:30 AM on November 2. The earliest sunset is at 4:31 PM on December 7, and the latest sunset is 4 hours, 1 minute later at 8:32 PM on June 27.

Daylight saving time (DST) is observed at Greeley-Weld County Airport during 2024, starting in the spring on March 10, lasting 7.8 months, and ending in the fall on November 3.

Sunrise & Sunset with Twilight and Daylight Saving Time at Greeley-Weld County Airport

Sunrise & Sunset with Twilight and Daylight Saving Time at Greeley-Weld County AirportJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 135:27 AMJun 135:27 AM8:32 PMJun 278:32 PMJun 27Dec 74:31 PMDec 74:31 PM7:30 AMNov 27:30 AMNov 2Mar 10DSTMar 10DSTDSTNov 3DSTNov 3daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
The solar day over the course of the year 2024. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray. The transitions to and from daylight saving time are indicated by the 'DST' labels.

The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

Solar Elevation and Azimuth at Greeley-Weld County Airport

Solar Elevation and Azimuth at Greeley-Weld County AirportJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AM00010101010202020303030404040505060607000010101020202020303040405050602673NowNow
northeastsouthwest
Solar elevation and azimuth over the course of the year 2024. The black lines are lines of constant solar elevation (the angle of the sun above the horizon, in degrees). The background color fills indicate the azimuth (the compass bearing) of the sun. The lightly tinted areas at the boundaries of the cardinal compass points indicate the implied intermediate directions (northeast, southeast, southwest, and northwest).

The figure below presents a compact representation of key lunar data for 2024. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases.

Moon Rise, Set & Phases at Greeley-Weld County Airport

The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

The perceived humidity level at Greeley-Weld County Airport, as measured by the percentage of time in which the humidity comfort level is muggy, oppressive, or miserable, does not vary significantly over the course of the year, remaining a virtually constant 0% throughout.

Humidity Comfort Levels at Greeley-Weld County Airport

Humidity Comfort Levels at Greeley-Weld County AirportJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jan 190%Jan 190%Jul 210%Jul 210%NowNowdrydryhumidhumid
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.
JanFebMarAprMayJunJulAugSepOctNovDec
Muggy days 0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed at Greeley-Weld County Airport experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 6.0 months, from November 15 to May 13, with average wind speeds of more than 8.2 miles per hour. The windiest month of the year at Greeley-Weld County Airport is March, with an average hourly wind speed of 9.4 miles per hour.

The calmer time of year lasts for 6.0 months, from May 13 to November 15. The calmest month of the year at Greeley-Weld County Airport is August, with an average hourly wind speed of 6.8 miles per hour.

Average Wind Speed at Greeley-Weld County Airport

Average Wind Speed at Greeley-Weld County AirportwindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mph16 mph16 mphMar 319.7 mphMar 319.7 mphAug 96.8 mphAug 96.8 mphNov 158.2 mphNov 158.2 mphMay 138.2 mphMay 138.2 mphNowNow
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.
JanFebMarAprMayJunJulAugSepOctNovDec
Wind Speed (mph) 9.39.39.49.48.27.57.06.87.37.98.28.7

The predominant average hourly wind direction at Greeley-Weld County Airport varies throughout the year.

The wind is most often from the north for 1.6 months, from April 8 to May 26, with a peak percentage of 34% on April 17. The wind is most often from the east for 3.2 months, from May 26 to August 31, with a peak percentage of 32% on July 29. The wind is most often from the west for 7.3 months, from August 31 to April 8, with a peak percentage of 54% on January 1.

Wind Direction at Greeley-Weld County Airport

Wind Direction at Greeley-Weld County AirportWNEWJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%NowNowwestsoutheastnorth
northeastsouthwest
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than 1.0 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

To characterize how pleasant the weather is at Greeley-Weld County Airport throughout the year, we compute two travel scores.

The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best time of year to visit Greeley-Weld County Airport for general outdoor tourist activities is from mid June to late August, with a peak score in the first week of July.

Tourism Score at Greeley-Weld County Airport

Tourism Score at Greeley-Weld County Airportbest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.76.70.10.1NowNowtemperaturetemperature cloudscloudsprecipitationprecipitationtourism score
The tourism score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit Greeley-Weld County Airport for hot-weather activities is from late June to early August, with a peak score in the second week of July.

Beach/Pool Score at Greeley-Weld County Airport

Beach/Pool Score at Greeley-Weld County Airportbest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810104.14.10.00.0NowNowtemperaturetemperature cloudscloudsprecipitationprecipitationbeach/pool score
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

Methodology

For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.

Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.

Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.

Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.

Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

The growing season at Greeley-Weld County Airport typically lasts for 5.1 months (155 days), from around May 1 to around October 3, rarely starting before April 11 or after May 19, and rarely ending before September 14 or after October 20.

Time Spent in Various Temperature Bands and the Growing Season at Greeley-Weld County Airport

Time Spent in Various Temperature Bands and the Growing Season at Greeley-Weld County Airportgrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%May 150%May 150%Oct 350%Oct 350%May 1990%May 1990%Sep 1490%Sep 1490%Apr 1110%Apr 1110%Oct 2010%Oct 2010%0%Dec 40%Dec 4Jul 15100%Jul 15100%NowNowfrigidfreezingvery coldcoolcomfortablewarmhotcold
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The percentage of time spent in various temperature bands. The black line is the percentage chance that a given day is within the growing season.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

Based on growing degree days alone, the first spring blooms at Greeley-Weld County Airport should appear around March 31, only rarely appearing before March 18 or after April 17.

Growing Degree Days at Greeley-Weld County Airport

Growing Degree Days at Greeley-Weld County AirportJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F500°F500°F1,000°F1,000°F1,500°F1,500°F2,000°F2,000°F2,500°F2,500°F3,000°F3,000°FMar 3190°FMar 3190°FJun 23900°FJun 23900°FAug 51,800°FAug 51,800°FDec 312,842°FDec 312,842°F
The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands.

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy experiences extreme seasonal variation over the course of the year.

The brighter period of the year lasts for 3.0 months, from May 8 to August 7, with an average daily incident shortwave energy per square meter above 6.8 kWh. The brightest month of the year at Greeley-Weld County Airport is June, with an average of 7.9 kWh.

The darker period of the year lasts for 3.3 months, from November 1 to February 11, with an average daily incident shortwave energy per square meter below 3.4 kWh. The darkest month of the year at Greeley-Weld County Airport is December, with an average of 2.3 kWh.

Average Daily Incident Shortwave Solar Energy at Greeley-Weld County Airport

Average Daily Incident Shortwave Solar Energy at Greeley-Weld County AirportbrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWh10 kWh10 kWhJun 208.0 kWhJun 208.0 kWhDec 202.3 kWhDec 202.3 kWhMay 86.8 kWhMay 86.8 kWhAug 76.8 kWhAug 76.8 kWhNov 13.4 kWhNov 13.4 kWhFeb 113.4 kWhFeb 113.4 kWhNowNow
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.
JanFebMarAprMayJunJulAugSepOctNovDec
Solar Energy (kWh) 2.63.65.06.27.17.97.56.65.64.22.92.3

For the purposes of this report, the geographical coordinates of Greeley-Weld County Airport are 40.428 deg latitude, -104.633 deg longitude, and 4,642 ft elevation.

The topography within 2 miles of Greeley-Weld County Airport contains only modest variations in elevation, with a maximum elevation change of 112 feet and an average elevation above sea level of 4,638 feet. Within 10 miles also contains only modest variations in elevation (479 feet). Within 50 miles contains only modest variations in elevation (7,572 feet).

The area within 2 miles of Greeley-Weld County Airport is covered by cropland (68%), grassland (19%), and shrubs (12%), within 10 miles by cropland (65%) and grassland (22%), and within 50 miles by grassland (56%) and cropland (21%).

This report illustrates the typical weather at Greeley-Weld County Airport, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

Temperature and Dew Point

Greeley-Weld County Airport has a weather station that reported reliably enough during the analysis period that we have included it in our network. When available, historical temperature and dew point measurements are taken directly from this weather station. These records are obtained from NOAA's Integrated Surface Hourly data set, falling back on ICAO METAR records as required.

In the case of missing or erroneous measurements from this station, we fall back on records from nearby stations, adjusted according to typical seasonal and diurnal intra-station differences. For a given day of the year and hour of the day, the fallback station is selected to minimize the prediction error over the years for which there are measurements for both stations.

The stations on which we may fall back include but are not limited to Fort Collins-Loveland Municipal Airport; Erie Municipal; Vance Brand Airport; Denver International Airport; Boulder Municipal Airport; Rocky Mountain Metropolitan Airport; Denver / Stapleton International, Co.; and Buckley Air Force Base.

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , by Jean Meeus.

All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.

Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.

Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.

Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .

Time zones for airports and weather stations are provided by AskGeo.com .

Maps are © OpenStreetMap contributors.

Disclaimer

The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.

We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.

Please review our full terms contained on our Terms of Service page.