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United States › New Mexico › Los Alamos County › Climate Station LOS ALAMOS, NM US Distance 0.8 mi Normals 1991–2020

30-year climate normals

Los Alamos County Climate and Weather Averages

Hottest month — July

82.5°

average daily high. The coldest month is January, averaging a low of 20.5°F.

Los Alamos County gets 17.49" of precipitation a year and 42.1" of snow, and 47% of it falls in Jul, Aug, Sep.

Temperature through the year

Each bar spans the average daily low to the average daily high for that month.

40° 60° 80° JanFebMarAprMayJunJulAugSepOctNovDec
MonthAvg highAvg low PrecipSnow
January 40.3° 20.5° 0.90" 9.9"
February 44.5° 23.6° 0.72" 8.8"
March 53.4° 29.6° 1.04" 5.9"
April 61.0° 35.4° 0.93" 3.3"
May 70.2° 44.2° 1.17" 0.1"
June 80.9° 53.5° 1.17" 0.0"
July 82.5° 56.7° 2.94" 0.0"
August 79.5° 55.1° 3.20" 0.0"
September 74.0° 49.1° 2.02" 0.0"
October 62.7° 38.4° 1.58" 1.7"
November 50.1° 28.2° 0.95" 4.4"
December 40.3° 20.6° 0.87" 8.0"

Rainfall by month

Los Alamos County has a distinct wet season. 47% of the year's precipitation arrives in Jul, Aug, Sep.

January 0.90"
February 0.72"
March 1.04"
April 0.93"
May 1.17"
June 1.17"
July 2.94"
August 3.20"
September 2.02"
October 1.58"
November 0.95"
December 0.87"
Annual total 17.49"

What this climate costs you

Degree days measure how hard a building has to work to stay comfortable. They are the reason two identical houses have very different power bills, and they are the link between the weather here and what you pay every month.

Cooling degree days How much air conditioning the climate demands 397
Heating degree days How much heating the climate demands 5,929
Approximate annual cooling cost At 14.12¢/kWh, New Mexico average $56
Approximate annual electric heating cost Lower where heating is gas rather than electric $293

These are rough planning figures from degree days and the state electricity price, not a bill estimate. House size, insulation and fuel type move them a lot. See the full cost of owning a home in Los Alamos County, where electricity is one line of eight.

Common questions

What is the weather like in Los Alamos County?

Los Alamos County averages a high of 82.5°F in July and a low of 20.5°F in January. Annual precipitation is 17.49 inches, including 42.1 inches of snow.

When is the rainy season in Los Alamos County?

The wettest stretch is Jul, Aug, Sep, which accounts for 47% of the year's precipitation. That is a pronounced wet season rather than rain spread evenly through the year.

How hot does it get in Los Alamos County?

The average daily high in July, the hottest month, is 82.5°F. That drives 397 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Los Alamos County?

Yes. Los Alamos County averages 42.1 inches of snow a year.

Sources

  • Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station LOS ALAMOS, NM US (USC00295084), 0.8 miles from the county centroid.
  • Heating and cooling degree days — NOAA, same station and period.
  • Electricity price — US Energy Information Administration, Electric Power Monthly Table 5.6.A, New Mexico residential average.
  • Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.