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Climate and Average Weather Year Round in Guilford Center Connecticut, United States

In Guilford Center, the summers are warm and humid; the winters are very cold, snowy, and windy; and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 24°F to 81°F and is rarely below 10°F or above 88°F.

Based on the tourism score, the best time of year to visit Guilford Center for warm-weather activities is from mid June to mid September.

Climate in Guilford Center

very coldcoldcoolwarmcoolcoldJanFebMarAprMayJunJulAugSepOctNovDecNowNow64%64%47%47%clearovercastprecipitation: 4.0 inprecipitation: 4.0 in2.7 in2.7 inmuggy: 55%muggy: 55%0%0%drydrytourism score: 7.0tourism score: 7.00.10.1
Guilford Center weather by month. Click on each chart for more information.

The warm season lasts for 3.4 months, from June 3 to September 16, with an average daily high temperature above 73°F. The hottest month of the year in Guilford Center is July, with an average high of 81°F and low of 66°F.

The cold season lasts for 3.3 months, from December 3 to March 14, with an average daily high temperature below 46°F. The coldest month of the year in Guilford Center is January, with an average low of 25°F and high of 38°F.

Average High and Low Temperature in Guilford Center

Average High and Low Temperature in Guilford CenterwarmcoldcoldJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FJan 3037°FJan 3037°FJul 2081°FJul 2081°F24°F24°F67°F67°FJun 373°FJun 373°FSep 1673°FSep 1673°FDec 346°FDec 346°FMar 1446°FMar 1446°F56°F56°F58°F58°F34°F34°F31°F31°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 38°F40°F47°F57°F67°F76°F81°F79°F72°F62°F52°F43°F
Temp. 31°F32°F39°F49°F58°F67°F73°F72°F65°F54°F45°F36°F
Low 25°F26°F33°F42°F51°F60°F66°F65°F58°F47°F38°F30°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 in Guilford Center

Average Hourly Temperature in Guilford CenterJanFebMarAprMayJunJulAugSepOctNovDec12 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 AMNowNowfreezingfreezingvery coldvery coldcoldcoldcoolcoolcomfortablewarmfreezing
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.

Utamysh, Russia (5,573 miles away) is the far-away foreign place with temperatures most similar to Guilford Center (view comparison).

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In Guilford Center, the average percentage of the sky covered by clouds experiences mild seasonal variation over the course of the year.

The clearer part of the year in Guilford Center begins around June 26 and lasts for 4.5 months, ending around November 11.

The clearest month of the year in Guilford Center is September, during which on average the sky is clear, mostly clear, or partly cloudy 64% of the time.

The cloudier part of the year begins around November 11 and lasts for 7.5 months, ending around June 26.

The cloudiest month of the year in Guilford Center is February, during which on average the sky is overcast or mostly cloudy 52% of the time.

Cloud Cover Categories in Guilford Center

Cloud Cover Categories in Guilford CenterclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Sep 564%Sep 564%Feb 2847%Feb 2847%Jun 2656%Jun 2656%Nov 1156%Nov 1156%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 51%52%51%51%50%47%41%38%36%38%45%50%
Clearer 49%48%49%49%50%53%59%62%64%62%55%50%

Guilford Center does not experience significant seasonal variation in the frequency of wet days (i.e., those with greater than 0.04 inches of liquid or liquid-equivalent precipitation). The frequency ranges from 23% to 32%, with an average value of 27%.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. The month with the most days of rain alone in Guilford Center is May, with an average of 9.0 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 32% on August 2.

Daily Chance of Precipitation in Guilford Center

Daily Chance of Precipitation in Guilford CenterJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Aug 232%Aug 232%Jan 2923%Jan 2923%Mar 1627%Mar 1627%Dec 2828%Dec 2828%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 4.5d4.5d6.8d8.2d9.0d8.7d9.0d8.4d7.7d7.7d7.2d6.5d
Mixed 1.5d1.4d1.0d0.2d0.0d0.0d0.0d0.0d0.0d0.0d0.3d1.2d
Snow 1.5d1.1d0.6d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.1d0.9d
Any 7.6d7.0d8.4d8.4d9.0d8.7d9.0d8.4d7.7d7.7d7.6d8.5d

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. Guilford Center experiences some seasonal variation in monthly rainfall.

Rain falls throughout the year in Guilford Center. The month with the most rain in Guilford Center is April, with an average rainfall of 3.7 inches.

The month with the least rain in Guilford Center is January, with an average rainfall of 2.3 inches.

Average Monthly Rainfall in Guilford Center

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 2.3″2.4″3.3″3.7″3.4″3.3″2.9″3.3″3.4″3.6″3.6″3.1″

Snowfall

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year. Guilford Center experiences significant seasonal variation in monthly snowfall.

The snowy period of the year lasts for 4.6 months, from November 19 to April 5, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow in Guilford Center is February, with an average snowfall of 6.8 inches.

The snowless period of the year lasts for 7.4 months, from April 5 to November 19. The least snow falls around July 29, with an average total accumulation of 0.0 inches.

Average Monthly Snowfall in Guilford Center

Average Monthly Snowfall in Guilford CentersnowsnowJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in5 in5 in10 in10 in15 in15 in20 in20 inFeb 57.2 inFeb 57.2 inJul 290.0 inJul 290.0 inNov 191.0 inNov 191.0 inApr 51.0 inApr 51.0 in
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 6.8″6.8″3.6″0.3″0.0″0.0″0.0″0.0″0.0″0.0″0.7″4.4″

The length of the day in Guilford Center varies significantly over the course of the year. In 2024, the shortest day is December 21, with 9 hours, 12 minutes of daylight; the longest day is June 20, with 15 hours, 10 minutes of daylight.

Hours of Daylight and Twilight in Guilford Center

Hours of Daylight and Twilight in Guilford CenterJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 8 minMar 1912 hr, 8 minMar 1915 hr, 10 minJun 2015 hr, 10 minJun 2012 hr, 11 minSep 2212 hr, 11 minSep 229 hr, 12 minDec 219 hr, 12 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 9.6h10.6h12.0h13.4h14.5h15.1h14.8h13.8h12.4h11.1h9.9h9.3h

The earliest sunrise is at 5:17 AM on June 14, and the latest sunrise is 2 hours, 7 minutes later at 7:23 AM on November 2. The earliest sunset is at 4:21 PM on December 7, and the latest sunset is 4 hours, 7 minutes later at 8:27 PM on June 27.

Daylight saving time (DST) is observed in Guilford Center 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 in Guilford Center

Sunrise & Sunset with Twilight and Daylight Saving Time in Guilford CenterJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 145:17 AMJun 145:17 AM8:27 PMJun 278:27 PMJun 27Dec 74:21 PMDec 74:21 PM7:23 AMNov 27:23 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 in Guilford Center

Solar Elevation and Azimuth in Guilford CenterJanFebMarAprMayJunJulAugSepOctNovDec12 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 AM0001010101020202030303040405050606000010101020202020303040405050602572NowNow
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 in Guilford Center

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.

Guilford Center experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 3.5 months, from June 9 to September 24, during which time the comfort level is muggy, oppressive, or miserable at least 14% of the time. The month with the most muggy days in Guilford Center is July, with 15.0 days that are muggy or worse.

The least muggy day of the year is February 23, when muggy conditions are essentially unheard of.

Humidity Comfort Levels in Guilford Center

Humidity Comfort Levels in Guilford CentermuggyJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Feb 230%Feb 230%Aug 155%Aug 155%Jun 914%Jun 914%Sep 2414%Sep 2414%NowNowoppressiveoppressivemuggymuggydrydrycomfortablecomfortable
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 0.0d0.0d0.0d0.0d0.7d6.2d15.0d13.6d6.2d1.1d0.0d0.0d

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 in Guilford Center experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 6.2 months, from October 12 to April 19, with average wind speeds of more than 7.6 miles per hour. The windiest month of the year in Guilford Center is January, with an average hourly wind speed of 9.5 miles per hour.

The calmer time of year lasts for 5.8 months, from April 19 to October 12. The calmest month of the year in Guilford Center is July, with an average hourly wind speed of 5.7 miles per hour.

Average Wind Speed in Guilford Center

Average Wind Speed in Guilford CenterwindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mphJan 309.6 mphJan 309.6 mphJul 315.6 mphJul 315.6 mphOct 127.6 mphOct 127.6 mphApr 197.6 mphApr 197.6 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) 9.59.48.97.86.65.95.75.86.67.78.69.1

The predominant average hourly wind direction in Guilford Center varies throughout the year.

The wind is most often from the north for 1.6 weeks, from March 10 to March 21, with a peak percentage of 34% on March 10. The wind is most often from the west for 1.2 months, from March 21 to April 28 and for 5.3 months, from October 1 to March 10, with a peak percentage of 31% on March 25. The wind is most often from the south for 5.1 months, from April 28 to October 1, with a peak percentage of 40% on July 27.

Wind Direction in Guilford Center

Wind Direction in Guilford CenterWNWSWJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%NowNowwestsouthnortheast
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).

Guilford Center is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.

The average water temperature experiences significant seasonal variation over the course of the year.

The time of year with warmer water lasts for 3.5 months, from June 24 to October 9, with an average temperature above 64°F. The month of the year in Guilford Center with the warmest water is August, with an average temperature of 71°F.

The time of year with cooler water lasts for 3.5 months, from December 30 to April 15, with an average temperature below 44°F. The month of the year in Guilford Center with the coolest water is February, with an average temperature of 37°F.

Average Water Temperature in Guilford Center

Average Water Temperature in Guilford CenterwarmcoolJanFebMarAprMayJunJulAugSepOctNovDec30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°FAug 1271°FAug 1271°F37°FFeb 2137°FFeb 21Jun 2464°FJun 2464°FOct 964°FOct 964°FDec 3044°FDec 3044°FApr 1544°FApr 1544°FNowNow
The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.
WaterJanFebMarAprMayJunJulAugSepOctNovDec
Temperature 41°F37°F39°F44°F52°F62°F69°F71°F68°F63°F55°F47°F

To characterize how pleasant the weather is in Guilford Center 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 Guilford Center for general outdoor tourist activities is from mid June to mid September, with a peak score in the last week of August.

Tourism Score in Guilford Center

Tourism Score in Guilford Centerbest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810107.07.00.10.16.86.8NowNowtemperaturetemperature 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 Guilford Center for hot-weather activities is from early July to mid August, with a peak score in the third week of July.

Beach/Pool Score in Guilford Center

Beach/Pool Score in Guilford Centerbest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.16.10.00.0NowNowtemperaturetemperature 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 in Guilford Center typically lasts for 6.8 months (208 days), from around April 8 to around November 2, rarely starting before March 23 or after April 24, and rarely ending before October 14 or after November 19.

Time Spent in Various Temperature Bands and the Growing Season in Guilford Center

Time Spent in Various Temperature Bands and the Growing Season in Guilford Centergrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%50%Apr 850%Apr 850%Nov 250%Nov 290%Apr 2490%Apr 2490%Oct 1490%Oct 1410%Mar 2310%Mar 2310%Nov 1910%Nov 190%Feb 40%Feb 4Jul 17100%Jul 17100%freezingvery coldcoldcoolcomfortablewarmhot
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 in Guilford Center should appear around April 24, only rarely appearing before April 12 or after May 4.

Growing Degree Days in Guilford Center

Growing Degree Days in Guilford CenterJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F500°F500°F1,000°F1,000°F1,500°F1,500°F2,000°F2,000°F2,500°F2,500°F3,000°F3,000°FApr 2489°FApr 2489°FJun 29900°FJun 29900°FAug 71,800°FAug 71,800°FDec 313,031°FDec 313,031°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 3.7 months, from April 30 to August 19, with an average daily incident shortwave energy per square meter above 5.9 kWh. The brightest month of the year in Guilford Center is June, with an average of 6.8 kWh.

The darker period of the year lasts for 3.2 months, from November 4 to February 11, with an average daily incident shortwave energy per square meter below 2.8 kWh. The darkest month of the year in Guilford Center is December, with an average of 1.8 kWh.

Average Daily Incident Shortwave Solar Energy in Guilford Center

Average Daily Incident Shortwave Solar Energy in Guilford CenterbrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWhJun 296.9 kWhJun 296.9 kWhDec 221.7 kWhDec 221.7 kWhApr 305.9 kWhApr 305.9 kWhAug 195.9 kWhAug 195.9 kWhNov 42.8 kWhNov 42.8 kWhFeb 112.8 kWhFeb 112.8 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) 2.02.94.15.36.26.86.65.94.93.62.31.8

For the purposes of this report, the geographical coordinates of Guilford Center are 41.282 deg latitude, -72.676 deg longitude, and 36 ft elevation.

The topography within 2 miles of Guilford Center contains only modest variations in elevation, with a maximum elevation change of 154 feet and an average elevation above sea level of 42 feet. Within 10 miles contains only modest variations in elevation (725 feet). Within 50 miles contains significant variations in elevation (1,660 feet).

The area within 2 miles of Guilford Center is covered by artificial surfaces (51%) and trees (37%), within 10 miles by trees (44%) and water (43%), and within 50 miles by trees (44%) and water (37%).

This report illustrates the typical weather in Guilford Center, 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

There are 4 weather stations near enough to contribute to our estimation of the temperature and dew point in Guilford Center.

For each station, the records are corrected for the elevation difference between that station and Guilford Center according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.

The estimated value at Guilford Center is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Guilford Center and a given station.

The stations contributing to this reconstruction are:

To get a sense of how much these sources agree with each other, you can view a comparison of Guilford Center and the stations that contribute to our estimates of its temperature history and climate. Please note that each source's contribution is adjusted for elevation and the relative change present in the MERRA-2 data.

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.