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United States › Montana › Teton County › Climate Station CHOTEAU, MT US Distance 4.2 mi Normals 1991–2020

30-year climate normals

Teton County Climate and Weather Averages

Hottest month — July

82.0°

average daily high. The coldest month is January, averaging a low of 13.4°F.

Teton County gets 11.93" of precipitation a year and 47.5" of snow, and 51% of it falls in Apr, May, Jun.

Temperature through the year

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

20° 40° 60° 80° JanFebMarAprMayJunJulAugSepOctNovDec
MonthAvg highAvg low PrecipSnow
January 37.4° 13.4° 0.28" 6.4"
February 38.9° 14.2° 0.41" 7.6"
March 47.0° 21.0° 0.52" 8.1"
April 55.8° 28.9° 1.15" 6.6"
May 65.1° 37.0° 2.14" 1.4"
June 72.3° 44.1° 2.75" 0.0"
July 82.0° 48.3° 0.99" 0.0"
August 81.0° 46.9° 1.06" 0.0"
September 71.6° 39.8° 1.16" 0.9"
October 58.0° 30.6° 0.74" 4.2"
November 45.0° 21.6° 0.41" 6.9"
December 37.4° 14.6° 0.32" 5.4"

Rainfall by month

Teton County has a distinct wet season. 51% of the year's precipitation arrives in Apr, May, Jun.

January 0.28"
February 0.41"
March 0.52"
April 1.15"
May 2.14"
June 2.75"
July 0.99"
August 1.06"
September 1.16"
October 0.74"
November 0.41"
December 0.32"
Annual total 11.93"

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 155
Heating degree days How much heating the climate demands 7,845
Approximate annual cooling cost At 14.67¢/kWh, Montana average $23
Approximate annual electric heating cost Lower where heating is gas rather than electric $403

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 Teton County, where electricity is one line of eight.

Common questions

What is the weather like in Teton County?

Teton County averages a high of 82.0°F in July and a low of 13.4°F in January. Annual precipitation is 11.93 inches, including 47.5 inches of snow.

When is the rainy season in Teton County?

The wettest stretch is Apr, May, Jun, which accounts for 51% 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 Teton County?

The average daily high in July, the hottest month, is 82.0°F. That drives 155 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Teton County?

Yes. Teton County averages 47.5 inches of snow a year.

Sources

  • Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station CHOTEAU, MT US (USC00241737), 4.2 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, Montana residential average.
  • Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.