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Average Weather in Lamar Colorado, United States

In Lamar, the summers are hot and mostly clear and the winters are very cold, dry, windy, and partly cloudy. Over the course of the year, the temperature typically varies from 16°F to 94°F and is rarely below 2°F or above 102°F.

Climate Summary

coldcoolwarmhotwarmcoolcoldJanFebMarAprMayJunJulAugSepOctNovDec77%77%59%59%clearovercastprecipitation: 2.3 inprecipitation: 2.3 in0.2 in0.2 inmuggy: 6%muggy: 6%0%0%drydrytourism score: 6.6tourism score: 6.60.30.3
Click on each chart for more information.

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

Temperature

The hot season lasts for 3.5 months, from June 1 to September 17, with an average daily high temperature above 84°F. The hottest day of the year is July 9, with an average high of 94°F and low of 64°F.

The cold season lasts for 3.0 months, from November 23 to February 22, with an average daily high temperature below 54°F. The coldest day of the year is January 3, with an average low of 16°F and high of 44°F.

Average High and Low Temperature

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.

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

Average Hourly Temperature in LamarJanFebMarAprMayJunJulAugSepOctNovDec12 AM4 AM8 AM12 PM4 PM8 PM12 AMfreezingfreezingfreezingfreezingcoldcoolcomfortablewarmhotcoldvery coldvery coldcomfortable
The average hourly temperature, color coded into bands: 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 shaded overlays indicate night and civil twilight.

Yerevan, Armenia (6,650 miles away); Sanandaj, Iran (7,013 miles); and Alik Ghund, Pakistan (7,665 miles) are the far-away foreign places with temperatures most similar to Lamar (view comparison).

Clouds

In Lamar, 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 Lamar begins around June 1 and lasts for 5.2 months, ending around November 6. On October 2, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 77% of the time, and overcast or mostly cloudy 23% of the time.

The cloudier part of the year begins around November 6 and lasts for 6.8 months, ending around June 1. On February 15, the cloudiest day of the year, the sky is overcast or mostly cloudy 41% of the time, and clear, mostly clear, or partly cloudy 59% of the time.

Cloud Cover Categories

Cloud Cover Categories in LamarclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Oct 277%Oct 277%Feb 1559%Feb 1559%Jun 168%Jun 168%Nov 668%Nov 668%clearmostly clearovercastpartly cloudymostly cloudy
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds: clear < 20% < mostly clear < 40% < partly cloudy < 60% < mostly cloudy < 80% < overcast.

Precipitation

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

The wetter season lasts 4.3 months, from April 24 to September 4, with a greater than 18% chance of a given day being a wet day. The chance of a wet day peaks at 32% on July 29.

The drier season lasts 7.7 months, from September 4 to April 24. The smallest chance of a wet day is 4% on January 11.

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 in Lamar changes throughout the year.

Rain alone is the most common for 9.9 months, from February 5 to December 2. The highest chance of a day with rain alone is 32% on July 29.

Snow alone is the most common for 2.1 months, from December 2 to February 5. The highest chance of a day with snow alone is 4% on January 6.

Daily Chance of Precipitation

Daily Chance of Precipitation in LamarsnowrainsnowJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Jul 2932%Jul 2932%Jan 114%Jan 114%Dec 25%Dec 25%Apr 2418%Apr 2418%Sep 418%Sep 418%rainmixed
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).

Rainfall

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. Lamar experiences significant seasonal variation in monthly rainfall.

The rainy period of the year lasts for 7.5 months, from March 19 to November 5, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around July 29, with an average total accumulation of 2.3 inches.

The rainless period of the year lasts for 4.5 months, from November 5 to March 19. The least rain falls around January 2, with an average total accumulation of 0.0 inches.

Average Monthly Rainfall

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 liquid-equivalent snowfall.

Snowfall

The sliding 31-day liquid-equivalent quantity of snowfall in Lamar does not vary significantly over the course of the year, staying within 0.1 inches of 0.1 inches throughout.

Average Liquid-Equivalent Monthly Snowfall

Average Liquid-Equivalent Monthly Snowfall in LamarsnowsnowJanFebMarAprMayJunJulAugSepOctNovDec0.0 in0.5 in1.0 in1.5 in2.0 in2.5 inDec 310.2 inDec 310.2 inJul 130.0 inJul 130.0 inMar 190.2 inMar 190.2 inOct 240.1 inOct 240.1 in
The average liquid-equivalent 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.

Sun

The length of the day in Lamar varies significantly over the course of the year. In 2017, the shortest day is December 21, with 9 hours, 31 minutes of daylight; the longest day is June 20, with 14 hours, 49 minutes of daylight.

Hours of Daylight and Twilight

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.

The earliest sunrise is at 5:27 AM on June 13, and the latest sunrise is 1 hour, 53 minutes later at 7:19 AM on November 4. The earliest sunset is at 4:30 PM on December 6, and the latest sunset is 3 hours, 47 minutes later at 8:17 PM on June 27.

Daylight saving time (DST) is observed in Lamar during 2017, starting in the spring on March 12, lasting 7.8 months, and ending in the fall on November 5.

Sunrise & Sunset with Twilight and Daylight Saving Time

Sunrise & Sunset with Twilight and Daylight Saving Time in LamarJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 135:27 AMJun 135:27 AM8:17 PMJun 278:17 PMJun 27Dec 64:30 PMDec 64:30 PM7:19 AMNov 47:19 AMNov 4Mar 12DSTMar 12DSTDSTNov 5DSTNov 5daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day over the course of the year 2017. 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.

Humidity

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 in Lamar, 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, staying within 3% of 3% throughout.

Humidity Comfort Levels

Humidity Comfort Levels in LamarJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Feb 280%Feb 280%Jul 286%Jul 286%humidhumidcomfortablecomfortabledrydry
The percentage of time spent at various humidity comfort levels, categorized by dew point: dry < 55°F < comfortable < 60°F < humid < 65°F < muggy < 70°F < oppressive < 75°F < miserable.

Wind

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 Lamar experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 3.8 months, from March 2 to June 26, with average wind speeds of more than 10.8 miles per hour. The windiest day of the year is April 1, with an average hourly wind speed of 12.1 miles per hour.

The calmer time of year lasts for 8.2 months, from June 26 to March 2. The calmest day of the year is December 21, with an average hourly wind speed of 9.5 miles per hour.

Average Wind Speed

Average Wind Speed in LamarwindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph2 mph4 mph6 mph8 mph10 mph12 mph14 mph16 mph18 mph20 mphApr 112.1 mphApr 112.1 mphDec 219.5 mphDec 219.5 mphJun 2610.8 mphJun 2610.8 mph
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

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

The wind is most often from the north for 2.8 months, from January 25 to April 18 and for 6.0 days, from November 8 to November 14, with a peak percentage of 33% on January 31. The wind is most often from the south for 6.7 months, from April 18 to November 8, with a peak percentage of 52% on July 18. The wind is most often from the west for 2.4 months, from November 14 to January 25, with a peak percentage of 35% on January 1.

Wind Direction

Wind Direction in LamarWNSWJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%westsoutheastnorth
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions (north, east, south, and west), excluding hours in which the mean wind speed is less than 1 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Best Time of Year to Visit

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

Tourism Score

Tourism Score in Lamarbest timeJanFebMarAprMayJunJulAugSepOctNovDec02468106.66.60.30.36.56.5 precipitationprecipitationcloudscloudstemperaturetemperaturetourism 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 Lamar for hot-weather activities is from late June to late August, with a peak score in the second week of July.

Beach/Pool Score

Beach/Pool Score in Lamarbest timeJanFebMarAprMayJunJulAugSepOctNovDec02468105.45.40.00.0 precipitationprecipitationcloudscloudstemperaturetemperaturebeach/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.

Growing Season

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 Lamar typically lasts for 5.5 months (167 days), from around April 27 to around October 11, rarely starting before April 8 or after May 15, and rarely ending before September 24 or after October 28.

Time Spent in Various Temperature Bands and the Growing Season

Time Spent in Various Temperature Bands and the Growing Season in Lamargrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Apr 2750%Apr 2750%Oct 1150%Oct 1150%May 1590%May 1590%Sep 2490%Sep 2490%Apr 810%Apr 810%Oct 2810%Oct 2810%Jul 18100%Jul 18100%frigidfreezingvery coldcoolcomfortablewarmhotcoldsweltering
The percentage of time spent in various temperature bands: 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 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 Lamar should appear around March 13, only rarely appearing before February 26 or after March 30.

Growing Degree Days

Growing Degree Days in LamarJanFebMarAprMayJunJulAugSepOctNovDec0°F500°F1,000°F1,500°F2,000°F2,500°F3,000°F3,500°F4,000°FMar 1388°FMar 1388°FJun 6900°FJun 6900°FJul 141,800°FJul 141,800°FDec 313,884°FDec 313,884°F
The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands.

Solar Energy

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 3.5 months, from April 24 to August 8, with an average daily incident shortwave energy per square meter above 6.9 kWh. The brightest day of the year is June 20, with an average of 8.0 kWh.

The darker period of the year lasts for 3.1 months, from November 5 to February 8, with an average daily incident shortwave energy per square meter below 3.7 kWh. The darkest day of the year is December 21, with an average of 2.6 kWh.

Average Daily Incident Shortwave Solar Energy

Average Daily Incident Shortwave Solar Energy in LamarbrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh1 kWh2 kWh3 kWh4 kWh5 kWh6 kWh7 kWh8 kWh9 kWh10 kWhJun 208.0 kWhJun 208.0 kWhDec 212.6 kWhDec 212.6 kWhApr 246.9 kWhApr 246.9 kWhAug 86.9 kWhAug 86.9 kWhNov 53.7 kWhNov 53.7 kWhFeb 83.7 kWhFeb 83.7 kWh
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

Topography

For the purposes of this report, the geographical coordinates of Lamar are 38.087 deg latitude, -102.621 deg longitude, and 3,642 ft elevation.

The topography within 2 miles of Lamar contains only modest variations in elevation, with a maximum elevation change of 121 feet and an average elevation above sea level of 3,636 feet. Within 10 miles also contains only modest variations in elevation (472 feet). Within 50 miles contains only modest variations in elevation (1,923 feet).

The area within 2 miles of Lamar is covered by grassland (42%), cropland (38%), and artificial surfaces (16%), within 10 miles by grassland (51%) and cropland (48%), and within 50 miles by grassland (64%) and cropland (31%).

Data Sources

This report illustrates the typical weather in Lamar, 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 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Lamar.

For each station, the records are corrected for the elevation difference between that station and Lamar 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 Lamar is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Lamar and a given station.

The stations contributing to this reconstruction are: Lamar Municipal Airport (99%, 6 kilometers, west) and Kit Carson County Airport (1.1%, 132 kilometers, north).

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , 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 aiports and weather stations are provided by AskGeo.com .

Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.

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.