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Spring Weather in Los Alamos New Mexico, United States

Daily high temperatures increase by 25°F, from 49°F to 74°F, rarely falling below 39°F or exceeding 83°F.

Daily low temperatures increase by 22°F, from 31°F to 52°F, rarely falling below 22°F or exceeding 60°F.

For reference, on July 4, the hottest day of the year, temperatures in Los Alamos typically range from 60°F to 82°F, while on December 30, the coldest day of the year, they range from 23°F to 39°F.

Average High and Low Temperature in the Spring in Los Alamos

Average High and Low Temperature in the Spring in Los AlamosMarAprMay10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°FWinterSummerMar 149°FMar 149°F31°F31°FMay 3174°FMay 3174°F52°F52°FApr 157°FApr 157°F36°F36°FMay 165°FMay 165°F43°F43°F
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 Los Alamos

Average Hourly Temperature in the Spring in Los AlamosMarAprMay12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMWinterSummerfreezingvery coldcoldcoolcomfortablewarmcomfortable
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.

Sofia, Bulgaria (6,155 miles away) is the far-away foreign place with temperatures most similar to Los Alamos (view comparison).

Compare Los Alamos to another city:

Clouds

The spring in Los Alamos experiences decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 39% to 27%.

The clearest day of the spring is May 31, with clear, mostly clear, or partly cloudy conditions 73% of the time.

For reference, on February 15, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 40%, while on September 29, 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 Los Alamos

Cloud Cover Categories in the Spring in Los AlamosMarAprMay0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%WinterSummerMar 161%Mar 161%May 3173%May 3173%Apr 166%Apr 166%May 169%May 169%clearmostly 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.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Los Alamos, the chance of a wet day over the course of the spring is essentially constant, remaining around 12% throughout.

For reference, the year's highest daily chance of a wet day is 35% on July 31, and its lowest chance is 8% on January 28.

Over the course of the spring in Los Alamos, the chance of a day with only rain increases from 6% to 11%, the chance of a day with mixed snow and rain decreases from 4% to 0%, and the chance of a day with only snow remains an essentially constant 1% throughout.

Probability of Precipitation in the Spring in Los Alamos

Probability of Precipitation in the Spring in Los AlamosMarAprMay0%0%2%2%4%4%6%6%8%8%10%10%12%12%14%14%16%16%18%18%20%20%WinterSummerMar 111%Mar 111%May 3111%May 3111%Apr 111%Apr 111%May 111%May 111%snowmixedrain
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 Los Alamos is essentially constant, remaining about 0.5 inches throughout, and rarely exceeding 1.6 inches.

Average Monthly Rainfall in the Spring in Los Alamos

Average Monthly Rainfall in the Spring in Los AlamosMarAprMay0.0 in0.0 in0.5 in0.5 in1.0 in1.0 in1.5 in1.5 in2.0 in2.0 inWinterSummerMar 10.4 inMar 10.4 inMay 310.6 inMay 310.6 inApr 10.5 inApr 10.5 inMay 10.6 inMay 10.6 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 liquid-equivalent snowfall.

Snowfall

We report snowfall in liquid-equivalent terms. The actual depth of new snowfall is typically between 5 and 10 times the liquid-equivalent amount, assuming the ground is frozen. As with rainfall, we consider the liquid-equivalent snowfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day liquid-equivalent snowfall during the spring in Los Alamos is essentially constant, remaining about 0.1 inches throughout, and rarely exceeding 0.4 inches or falling below -0.0 inches.

Average Monthly Liquid-Equivalent Snowfall in the Spring in Los Alamos

Average Monthly Liquid-Equivalent Snowfall in the Spring in Los AlamosMarAprMay0.0 in0.0 in0.2 in0.2 in0.4 in0.4 in0.6 in0.6 in0.8 in0.8 in1.0 in1.0 inWinterSummerMar 10.1 inMar 10.1 inMay 310.0 inMay 310.0 inApr 10.1 inApr 10.1 inMay 10.0 inMay 10.0 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

Over the course of the spring in Los Alamos, 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, 0 minutes, implying an average daily increase of 1 minute, 59 seconds, and weekly increase of 13 minutes, 50 seconds.

The shortest day of the spring is March 1, with 11 hours, 26 minutes of daylight and the longest day is May 31, with 14 hours, 26 minutes of daylight.

Hours of Daylight and Twilight in the Spring in Los Alamos

Hours of Daylight and Twilight in the Spring in Los AlamosMarAprMay0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrWinterSummerMar 2012 hr, 7 minMar 2012 hr, 7 minnightnightdaydayMay 3114 hr, 26 minMay 3114 hr, 26 minMay 113 hr, 40 minMay 113 hr, 40 min
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 Los Alamos is 7:16 AM on March 14 and the earliest sunrise is 1 hour, 27 minutes earlier at 5:50 AM on May 31.

The earliest sunset is 6:00 PM on March 1 and the latest sunset is 2 hours, 15 minutes later at 8:15 PM on May 31.

Daylight saving time (DST) starts at 3:00 AM on March 14, 2021, shifting sunrise and sunset to be an hour later.

For reference, on June 21, the longest day of the year, the Sun rises at 5:49 AM and sets 14 hours, 36 minutes later, at 8:25 PM, while on December 21, the shortest day of the year, it rises at 7:11 AM and sets 9 hours, 43 minutes later, at 4:55 PM.

Sunrise & Sunset with Twilight and Daylight Saving Time in the Spring in Los Alamos

Sunrise & Sunset with Twilight and Daylight Saving Time in the Spring in Los AlamosMarAprMay2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMWinterSummer5:50 AM5:50 AMMay 318:15 PMMay 318:15 PM6:34 AM6:34 AMMar 16:00 PMMar 16:00 PM6:51 AM6:51 AMApr 17:27 PMApr 17:27 PM6:12 AM6:12 AMMay 17:52 PMMay 17:52 PMMar 14DSTMar 14DSTSolarMidnightSolarMidnightSolarNoonSunriseSunset
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.

Moon

The figure below presents a compact representation of key lunar data for the spring of 2021. 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 Los Alamos

Moon Rise, Set & Phases in the Spring in Los AlamosMarAprMay12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMWinterSummerFeb 1112:06 PMFeb 1112:06 PMFeb 271:18 AMFeb 271:18 AMMar 133:22 AMMar 133:22 AMMar 2812:49 PMMar 2812:49 PMApr 118:31 PMApr 118:31 PMApr 269:32 PMApr 269:32 PMMay 111:01 PMMay 111:01 PMMay 265:15 AMMay 265:15 AMJun 104:53 AMJun 104:53 AMJun 2412:40 PMJun 2412:40 PM7:13 AM7:13 AM5:45 PM5:45 PM5:25 PM5:25 PM7:11 AM7:11 AM6:37 PM6:37 PM6:22 PM6:22 PM7:12 AM7:12 AM7:24 PM7:24 PM7:33 PM7:33 PM6:47 AM6:47 AM6:06 AM6:06 AM8:09 PM8:09 PM7:36 PM7:36 PM6:00 AM6:00 AM8:55 PM8:55 PM7:40 PM7:40 PM5:30 AM5:30 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.

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 chance that a given day will be muggy in Los Alamos is essentially constant during the spring, remaining around 0% throughout.

For reference, on August 26, the muggiest day of the year, there are muggy conditions 0% of the time, while on January 1, the least muggy day of the year, there are muggy conditions 0% of the time.

Humidity Comfort Levels in the Spring in Los Alamos

Humidity Comfort Levels in the Spring in Los AlamosMarAprMay0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%WinterSummerMar 10%Mar 10%May 310%May 310%Apr 10%Apr 10%May 10%May 10%drydrycomfortablecomfortable
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.

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 Los Alamos is essentially constant during the spring, remaining within 0.5 miles per hour of 8.4 miles per hour throughout.

For reference, on April 11, the windiest day of the year, the daily average wind speed is 8.9 miles per hour, while on August 3, the calmest day of the year, the daily average wind speed is 5.1 miles per hour.

The highest daily average wind speed during the spring is 8.9 miles per hour on April 11.

Average Wind Speed in the Spring in Los Alamos

Average Wind Speed in the Spring in Los AlamosMarAprMay0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mph16 mph16 mphWinterSummerApr 118.9 mphApr 118.9 mphMar 18.0 mphMar 18.0 mphMay 317.8 mphMay 317.8 mphMay 18.6 mphMay 18.6 mph
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 Los Alamos throughout the spring is predominantly from the west, with a peak proportion of 58% on April 4.

Wind Direction in the Spring in Los Alamos

Wind Direction in the Spring in Los AlamosMarAprMay0%100%20%80%40%60%60%40%80%20%100%0%WinterSummerwestsouthnortheast
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).

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 Los Alamos typically lasts for 5.9 months (180 days), from around April 24 to around October 21, rarely starting before April 4 or after May 13, and rarely ending before October 1 or after November 9.

During the spring in Los Alamos, the chance that a given day is within the growing season is very rapidly increasing rising from 0% to 100% over the course of the season.

Time Spent in Various Temperature Bands and the Growing Season in the Spring in Los Alamos

Time Spent in Various Temperature Bands and the Growing Season in the Spring in Los Alamosgrowing seasonMarAprMay0%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%100%May 31100%May 31Apr 16%Apr 16%68%May 168%May 10%Mar 90%Mar 9freezingvery 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.

The average accumulated growing degree days in Los Alamos are rapidly increasing during the spring, increasing by 457°F, from 9°F to 466°F, over the course of the season.

Growing Degree Days in the Spring in Los Alamos

Growing Degree Days in the Spring in Los AlamosMarAprMay100°F100°F200°F200°F300°F300°F400°F400°F500°F500°F600°F600°FWinterSummerMar 19°FMar 19°FMay 31466°FMay 31466°FApr 153°FApr 153°FMay 1176°FMay 1176°F
The average growing degree days accumulated over the course of the spring, 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 in Los Alamos is very rapidly increasing during the spring, rising by 3.2 kWh, from 4.9 kWh to 8.2 kWh, over the course of the season.

Average Daily Incident Shortwave Solar Energy in the Spring in Los Alamos

Average Daily Incident Shortwave Solar Energy in the Spring in Los AlamosMarAprMay0 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 318.2 kWhMay 318.2 kWhApr 16.4 kWhApr 16.4 kWhMay 17.5 kWhMay 17.5 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 Los Alamos are 35.888 deg latitude, -106.307 deg longitude, and 7,178 ft elevation.

The topography within 2 miles of Los Alamos contains very significant variations in elevation, with a maximum elevation change of 1,424 feet and an average elevation above sea level of 7,300 feet. Within 10 miles contains very significant variations in elevation (6,178 feet). Within 50 miles also contains extreme variations in elevation (8,045 feet).

The area within 2 miles of Los Alamos is covered by shrubs (89%), within 10 miles by shrubs (57%) and trees (41%), and within 50 miles by shrubs (56%) and trees (39%).

Data Sources

This report illustrates the typical weather in Los Alamos, 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 is only a single weather station, Los Alamos County Airport, in our network suitable to be used as a proxy for the historical temperature and dew point records of Los Alamos.

At a distance of 2 kilometers from Los Alamos, closer than our threshold of 150 kilometers, this station is deemed sufficiently nearby to be relied upon as our primary source for temperature and dew point records.

The station records are corrected for the elevation difference between the station and Los Alamos according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.

Please note that the station records themselves may additionally have been back-filled using other nearby stations or the MERRA-2 reanalysis.

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 © 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.