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United States › Colorado › Alamosa County › Climate Station ALAMOSA SAN LUIS AP, CO US Distance 9.8 mi Normals 1991–2020

30-year climate normals

Alamosa County Climate and Weather Averages

Hottest month — July

83.3°

average daily high. The coldest month is January, averaging a low of -1.1°F.

Alamosa County gets 7.41" of precipitation a year and 27.9" of snow, and 45% 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.

0° 20° 40° 60° 80° JanFebMarAprMayJunJulAugSepOctNovDec
MonthAvg highAvg low PrecipSnow
January 34.8° -1.1° 0.32" 4.5"
February 41.2° 7.4° 0.28" 4.1"
March 52.7° 17.6° 0.54" 4.3"
April 60.2° 25.0° 0.57" 3.5"
May 69.8° 33.6° 0.60" 0.8"
June 80.2° 40.9° 0.43" 0.0"
July 83.3° 47.3° 1.04" 0.0"
August 80.5° 45.8° 1.29" 0.0"
September 74.4° 37.3° 0.98" 0.5"
October 62.8° 24.8° 0.65" 2.2"
November 48.5° 12.1° 0.37" 3.4"
December 35.4° 0.8° 0.34" 4.6"

Rainfall by month

Alamosa County has a distinct wet season. 45% of the year's precipitation arrives in Jul, Aug, Sep.

January 0.32"
February 0.28"
March 0.54"
April 0.57"
May 0.60"
June 0.43"
July 1.04"
August 1.29"
September 0.98"
October 0.65"
November 0.37"
December 0.34"
Annual total 7.41"

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 71
Heating degree days How much heating the climate demands 8,321
Approximate annual cooling cost At 16.16¢/kWh, Colorado average $11
Approximate annual electric heating cost Lower where heating is gas rather than electric $471

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 Alamosa County, where electricity is one line of eight.

Common questions

What is the weather like in Alamosa County?

Alamosa County averages a high of 83.3°F in July and a low of -1.1°F in January. Annual precipitation is 7.41 inches, including 27.9 inches of snow.

When is the rainy season in Alamosa County?

The wettest stretch is Jul, Aug, Sep, which accounts for 45% 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 Alamosa County?

The average daily high in July, the hottest month, is 83.3°F. That drives 71 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Alamosa County?

Yes. Alamosa County averages 27.9 inches of snow a year.

Sources

  • Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station ALAMOSA SAN LUIS AP, CO US (USW00023061), 9.8 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, Colorado residential average.
  • Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.