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United States › Montana › Flathead County › Climate Station HUNGRY HORSE DAM, MT US Distance 3.5 mi Normals 1991–2020

30-year climate normals

Flathead County Climate and Weather Averages

Hottest month — July

82.3°

average daily high. The coldest month is February, averaging a low of 19.8°F.

Flathead County gets 34.62" of precipitation a year, and 32% of it falls in Nov, Dec, Jan.

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 Precip
January 30.5° 19.9° 3.62"
February 34.1° 19.8° 2.53"
March 43.1° 25.4° 3.21"
April 52.5° 32.2° 2.65"
May 63.7° 40.5° 2.87"
June 70.9° 47.1° 3.82"
July 82.3° 52.9° 1.42"
August 81.4° 51.8° 1.23"
September 69.1° 43.7° 2.21"
October 52.2° 34.8° 3.52"
November 37.7° 27.5° 3.88"
December 30.6° 21.0° 3.66"

Rainfall by month

Precipitation is spread fairly evenly through the year here, with 32% falling in the wettest three months (Nov, Dec, Jan).

January 3.62"
February 2.53"
March 3.21"
April 2.65"
May 2.87"
June 3.82"
July 1.42"
August 1.23"
September 2.21"
October 3.52"
November 3.88"
December 3.66"
Annual total 34.62"

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 293
Heating degree days How much heating the climate demands 7,787
Approximate annual cooling cost At 14.67¢/kWh, Montana average $43
Approximate annual electric heating cost Lower where heating is gas rather than electric $400

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 Flathead County, where electricity is one line of eight.

Common questions

What is the weather like in Flathead County?

Flathead County averages a high of 82.3°F in July and a low of 19.8°F in February. Annual precipitation is 34.62 inches, with essentially no snow.

When is the rainy season in Flathead County?

The wettest stretch is Nov, Dec, Jan, which accounts for 32% of the year's precipitation. Precipitation is relatively evenly distributed across the year.

How hot does it get in Flathead County?

The average daily high in July, the hottest month, is 82.3°F. That drives 293 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Flathead County?

Effectively no. Measurable snowfall is rare in Flathead County.

Sources

  • Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station HUNGRY HORSE DAM, MT US (USC00244328), 3.5 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.