Average Temperatures for Montana in December

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Average temperatures for December at cities, towns, parks and lakes throughout Montana are listed below in degrees Fahrenheit and Celsius.

The tables give the normals for maximum and minimum monthly temperatures based on weather data collected from 1981 to 2010.

You can jump to a separate table for each region of the state: Northwestern, Southwestern, South - Central and Eastern Montana.

Northwestern Montana

Average December temperatures
High °F Low °F Place High °C Low °C
32 12 Cut Bank  0 -11
31 13 East Glacier Park  0 -10
32 21 Flathead Lake, Polson  0   -6
33 15 Gibson Reservoir Dam  1   -9
30 16 Kalispell -1   -9
32 21 Libby  0   -6
31 17 Missoula -1   -9
29   9 Polebridge -2 -13
34 16 Rogers Pass  1   -9
30 12 Seeley Lake -1 -11
29 18 West Glacier -2   -8
28 16 Whitefish -2   -9

Southwestern Montana

Average daily temperatures in December
High °F Low °F Place High °C Low °C
34 13 Bozeman  1 -11
30   5 Butte -1 -15
32   9 Deer Lodge  0 -13
33 16 Gardiner  0   -9
22   5 Hebgen Lake Dam -6 -15
32 12 Helena  0 -11
32 11 Sula  0 -12
35 12 Virginia City  2 -11
22  -1 West Yellowstone -6 -18

South - Central Montana

December temperatures: daily averages
High °F Low °F Place High °C Low °C
38 19 Bighorn Lake, Yellowtail Dam  3   -7
35 18 Billings  2   -8
24   4 Cooke City -5 -16
34 18 Mystic Lake  1   -8
34 13 Red Lodge  1 -11

Eastern Montana

Average December temperatures
High °F Low °F Place High °C Low °C
27   5 Culbertson -3 -15
33 10 Elwell Lake, Tiber Dam  1 -12
32 10 Fort Peck Lake Dam  0 -12
26   7 Glasgow -3 -14
30 11 Glendive -1 -12
35 15 Great Falls  1 -10
30   8 Havre City -1 -13
34 13 Lewistown  1 -11
31 10 Miles City -1 -12
Reference

National Climatic Data Center. NOAA's 1981-2010 Climate Normals.

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