Los Alamos County Climate
Los Alamos County, New Mexico
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
49.8°F
Annual Precip
17.5"
Annual Snowfall
42.1"
Extreme Heat Days
5
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
7b
Minimum winter temperature range for plant survival
2,451
Favors cool-season crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Los Alamos County
Climate Verdict
Los Alamos County has a cool, averaging 49.8°F annually, semi-arid conditions with only 17.5 inches of annual precipitation, rare extreme heat with only 4.7 days above 90°F annually, moderate snowfall of 42.1 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 30.4°F. summers are pleasantly cool with July averaging 69.6°F. The 39°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Winter sports enthusiasts benefit from reliable snow cover for 3-4 months annually.
Regional Context
Los Alamos County is 5.0°F cooler than the New Mexico statewide average of 54.8°F, it is somewhat wetter than average for New Mexico, the county experiences 53.20685545935546 fewer extreme heat days than the state average.
Climate Profile
About Los Alamos County Weather
Cool alpine mountain weather
Los Alamos County is the coolest in this group, with a 49.8°F average annual temperature that sits below the national median. Its high-altitude mountain climate is distinct from the surrounding desert lowlands.
Colder than the state average
Los Alamos is significantly cooler than the New Mexico average of 54.8°F. It represents the state's alpine climate, where elevation dictates weather patterns more than latitude.
The region's snowy outlier
Compared to Harding County's 54.2°F, Los Alamos is much colder and wetter, receiving 17.5 inches of precipitation. Its 42.1 inches of snow dwarfs every other county in this set.
Extreme snow and rare heat
Extreme heat is rare here, with only 5 days a year reaching 90°F and a mild July average of 69.6°F. Winters are snowy and cold, averaging 31.7°F between December and February.
Focus on winter preparedness
Heavy-duty winter gear and snow-clearing tools are essential for the 42.1 inches of annual snowfall. Residents can often forgo heavy air conditioning, as summer highs are among the lowest in the state.
Frequently Asked Questions
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Data sources: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020. Forecast and alert data from National Weather Service API. Air quality data from Open-Meteo.
Climate normals are 30-year averages of weather variables. Station data is aggregated to county level. Forecasts and alerts are fetched live and may change frequently. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.