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Spring Weather in San Luis Colorado, United States

Daily high temperatures increase by 26°F, from 44°F to 70°F, rarely falling below 33°F or exceeding 78°F.

Daily low temperatures increase by 21°F, from 20°F to 40°F, rarely falling below 9°F or exceeding 46°F.

For reference, on July 7, the hottest day of the year, temperatures in San Luis typically range from 48°F to 78°F, while on January 7, the coldest day of the year, they range from 10°F to 34°F.

Average High and Low Temperature in the Spring in San Luis

Average High and Low Temperature in the Spring in San LuisMarAprMay0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°FWinterSummerMar 144°FMar 144°F20°F20°FMay 3170°FMay 3170°F40°F40°FApr 152°FApr 152°F25°F25°FMay 160°FMay 160°F32°F32°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.

The figure below shows you a compact characterization of the hourly average spring temperatures. The horizontal axis is the day, 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 the Spring in San Luis

Average Hourly Temperature in the Spring in San LuisMarAprMay12 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 AMWinterSummerNowNowfreezingfreezingvery coldcoldcoolcomfortablefrigidwarmcool
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.

Koprivshtitsa, Bulgaria (6,088 miles away); Norashen, Armenia (6,701 miles); and Xining, China (7,055 miles) are the far-away foreign places with temperatures most similar to San Luis (view comparison).

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The spring in San Luis experiences gradually decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 37% to 29%.

The clearest day of the spring is May 31, with clear, mostly clear, or partly cloudy conditions 71% of the time.

For reference, on February 10, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 38%, while on September 28, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 79%.

Cloud Cover Categories in the Spring in San Luis

Cloud Cover Categories in the Spring in San LuisMarAprMay0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%WinterSummerMar 163%Mar 163%May 3171%May 3171%Apr 165%Apr 165%May 165%May 165%NowNowclearmostly clearpartly 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.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In San Luis, the chance of a wet day over the course of the spring is essentially constant, remaining around 17% throughout.

For reference, the year's highest daily chance of a wet day is 36% on August 9, and its lowest chance is 8% on January 14.

Over the course of the spring in San Luis, the chance of a day with only rain increases from 5% to 16%, the chance of a day with mixed snow and rain decreases from 5% to 0%, and the chance of a day with only snow decreases from 6% to 0%.

Probability of Precipitation in the Spring in San Luis

Probability of Precipitation in the Spring in San LuisMarAprMay0%0%2%2%4%4%6%6%8%8%10%10%12%12%14%14%16%16%18%18%20%20%WinterSummerMar 116%Mar 116%May 3116%May 3116%Apr 117%Apr 117%May 118%May 118%NowNowsnowmixedrain
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 season and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during the spring in San Luis is increasing, starting the season at 0.3 inches, when it rarely exceeds 0.6 inches, and ending the season at 0.8 inches, when it rarely exceeds 1.7 inches or falls below 0.1 inches.

Average Monthly Rainfall in the Spring in San Luis

Average Monthly Rainfall in the Spring in San LuisMarAprMay0 in0 in1 in1 in2 in2 in3 in3 in4 in4 inWinterSummerMar 10.3 inMar 10.3 inMay 310.8 inMay 310.8 inApr 10.5 inApr 10.5 inMay 10.8 inMay 10.8 in
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.

Snowfall

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day snowfall during the spring in San Luis is rapidly decreasing, starting the season at 3.9 inches, when it rarely exceeds 8.3 inches or falls below 0.6 inches, and ending the season at 0.1 inches, when it rarely exceeds 0.1 inches or falls below -0.0 inches.

The highest average 31-day accumulation is 4.3 inches on March 26.

Average Monthly Snowfall in the Spring in San Luis

Average Monthly Snowfall in the Spring in San LuisMarAprMay0 in0 in2 in2 in4 in4 in6 in6 in8 in8 in10 in10 inWinterSummerMar 264.3 inMar 264.3 inMar 13.9 inMar 13.9 inMay 310.1 inMay 310.1 inMay 12.1 inMay 12.1 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.

Over the course of the spring in San Luis, the length of the day is very rapidly increasing. From the start to the end of the season, the length of the day increases by 3 hours, 8 minutes, implying an average daily increase of 2 minutes, 4 seconds, and weekly increase of 14 minutes, 30 seconds.

The shortest day of the spring is March 1, with 11 hours, 24 minutes of daylight and the longest day is May 31, with 14 hours, 33 minutes of daylight.

Hours of Daylight and Twilight in the Spring in San Luis

Hours of Daylight and Twilight in the Spring in San LuisMarAprMay0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrWinterSummerMar 1912 hr, 7 minMar 1912 hr, 7 minnightnightdaydayMay 3114 hr, 33 minMay 3114 hr, 33 minMay 113 hr, 45 minMay 113 hr, 45 minNowNow
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 latest sunrise of the spring in San Luis is 7:19 AM on March 10 and the earliest sunrise is 1 hour, 36 minutes earlier at 5:43 AM on May 31.

The earliest sunset is 5:56 PM on March 1 and the latest sunset is 2 hours, 20 minutes later at 8:16 PM on May 31.

Daylight saving time (DST) ends at 3:00 AM on March 10, 2024, shifting sunrise and sunset to be an hour earlier.

For reference, on June 20, the longest day of the year, the Sun rises at 5:41 AM and sets 14 hours, 44 minutes later, at 8:25 PM, while on December 21, the shortest day of the year, it rises at 7:12 AM and sets 9 hours, 36 minutes later, at 4:48 PM.

Sunrise & Sunset with Twilight and Daylight Saving Time in the Spring in San Luis

Sunrise & Sunset with Twilight and Daylight Saving Time in the Spring in San LuisMarAprMay2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMWinterSummer5:43 AM5:43 AMMay 318:16 PMMay 318:16 PM6:31 AM6:31 AMMar 15:56 PMMar 15:56 PM6:46 AM6:46 AMApr 17:24 PMApr 17:24 PM6:06 AM6:06 AMMay 17:51 PMMay 17:51 PMMar 10DSTMar 10DSTSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
The solar day in the spring. 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 the Spring in San Luis

Solar Elevation and Azimuth in the Spring in San LuisMarAprMay12 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 AMWinterSummer00102030304050600101020304040506070NowNow
northeastsouthwest
Solar elevation and azimuth in the the spring of 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 the spring of 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. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.

Moon Rise, Set & Phases in the Spring in San Luis

Moon Rise, Set & Phases in the Spring in San LuisMarAprMay12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMWinterSummerFeb 94:00 PMFeb 94:00 PMFeb 245:31 AMFeb 245:31 AMMar 103:01 AMMar 103:01 AMMar 251:01 AMMar 251:01 AMApr 812:22 PMApr 812:22 PMApr 235:50 PMApr 235:50 PMMay 79:23 PMMay 79:23 PMMay 237:54 AMMay 237:54 AMJun 66:38 AMJun 66:38 AMJun 217:09 PMJun 217:09 PM7:07 AM7:07 AM5:26 PM5:26 PM5:11 PM5:11 PM7:00 AM7:00 AM7:38 AM7:38 AM7:47 PM7:47 PM6:58 PM6:58 PM7:10 AM7:10 AM6:31 AM6:31 AM7:49 PM7:49 PM7:47 PM7:47 PM6:25 AM6:25 AM7:54 PM7:54 PM7:44 PM7:44 PM5:30 AM5:30 AM5:24 AM5:24 AM9:08 PM9:08 PM8:44 PM8:44 PM5:53 AM5:53 AM
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 chance that a given day will be muggy in San Luis is essentially constant during the spring, remaining around 0% throughout.

Humidity Comfort Levels in the Spring in San Luis

Humidity Comfort Levels in the Spring in San LuisMarAprMay0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%WinterSummerApr 160%Apr 160%Mar 10%Mar 10%May 310%May 310%Apr 10%Apr 10%May 10%May 10%drydry
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.

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 San Luis is gradually decreasing during the spring, decreasing from 9.2 miles per hour to 8.3 miles per hour over the course of the season.

For reference, on April 10, the windiest day of the year, the daily average wind speed is 9.8 miles per hour, while on August 1, the calmest day of the year, the daily average wind speed is 5.5 miles per hour.

The highest daily average wind speed during the spring is 9.8 miles per hour on April 10.

Average Wind Speed in the Spring in San Luis

Average Wind Speed in the Spring in San LuisMarAprMay0 mph0 mph5 mph5 mph10 mph10 mph15 mph15 mphWinterSummerApr 109.8 mphApr 109.8 mphMar 19.2 mphMar 19.2 mphMay 318.3 mphMay 318.3 mphMay 19.2 mphMay 19.2 mphNowNow
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The hourly average wind direction in San Luis throughout the spring is predominantly from the west, with a peak proportion of 68% on March 1.

Wind Direction in the Spring in San Luis

Wind Direction in the Spring in San LuisMarAprMay0%100%20%80%40%60%60%40%80%20%100%0%WinterSummerNowNowwestsouthnortheast
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).

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 San Luis typically lasts for 4.0 months (122 days), from around May 24 to around September 23, rarely starting before May 4 or after June 14, and rarely ending before September 6 or after October 11.

During the spring in San Luis, the chance that a given day is within the growing season is very rapidly increasing rising from 0% to 66% over the course of the season.

Time Spent in Various Temperature Bands and the Growing Season in the Spring in San Luis

Time Spent in Various Temperature Bands and the Growing Season in the Spring in San LuisMarAprMay0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%WinterSummerMar 10%Mar 10%66%May 3166%May 31Apr 10%Apr 10%May 16%May 16%90%Jun 1490%Jun 14NowNowfrigidfreezingvery coldcoldcoolwarmcomfortable
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.

The average accumulated growing degree days in San Luis are increasing during the spring, increasing by 231°F, from 2°F to 233°F, over the course of the season.

Growing Degree Days in the Spring in San Luis

Growing Degree Days in the Spring in San LuisMarAprMay50°F50°F100°F100°F150°F150°F200°F200°F250°F250°F300°F300°FWinterSummerMar 12°FMar 12°FMay 31233°FMay 31233°FApr 120°FApr 120°FMay 178°FMay 178°FNowNow
The average growing degree days accumulated over the course of the spring, 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 in San Luis is very rapidly increasing during the spring, rising by 3.2 kWh, from 4.9 kWh to 8.1 kWh, over the course of the season.

Average Daily Incident Shortwave Solar Energy in the Spring in San Luis

Average Daily Incident Shortwave Solar Energy in the Spring in San LuisMarAprMay0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWh10 kWh10 kWhWinterSummerMar 14.9 kWhMar 14.9 kWhMay 318.1 kWhMay 318.1 kWhApr 16.3 kWhApr 16.3 kWhMay 17.3 kWhMay 17.3 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.

For the purposes of this report, the geographical coordinates of San Luis are 37.201 deg latitude, -105.424 deg longitude, and 7,976 ft elevation.

The topography within 2 miles of San Luis contains significant variations in elevation, with a maximum elevation change of 581 feet and an average elevation above sea level of 8,059 feet. Within 10 miles contains significant variations in elevation (4,167 feet). Within 50 miles also contains extreme variations in elevation (8,264 feet).

The area within 2 miles of San Luis is covered by shrubs (69%) and cropland (19%), within 10 miles by shrubs (64%) and trees (24%), and within 50 miles by shrubs (46%) and trees (38%).

This report illustrates the typical weather in San Luis, 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 5 weather stations near enough to contribute to our estimation of the temperature and dew point in San Luis.

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

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