Los Alamos County Climate
Los Alamos County, New Mexico
Avg Annual Temp
49.8°F
Annual Precip
17.5"
Annual Snowfall
42.1"
Extreme Heat Days
4.7
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
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 source: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020.
Climate normals are 30-year averages of weather variables computed from 1991 to 2020. Station data is aggregated to county level using spatial averaging. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.