Average Temperatures for Montana in August





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

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

The tables give the normals for maximum and minimum temperatures based on weather data collected from 1991 to 2020 by the US National Centers for Environmental Information.

Northwestern Montana

Average August temperatures
High °F Low °F Place High °C Low °C
80 48 Cut Bank 27 9
74 44 East Glacier Park 23 7
78 43 Gibson Reservoir Dam 26 6
82 46 Kalispell 28 8
90 47 Libby 32 9
84 50 Missoula 29 10
82 38 Polebridge 28 3
82 53 Polson 28 11
81 49 Rogers Pass 27 9
83 43 Seeley Lake 28 6
79 48 West Glacier 26 9
80 48 Whitefish 27 9

Southwestern Montana

Average daily temperatures in August
High °F Low °F Place High °C Low °C
82 47 Anaconda 28 9
81 50 Bozeman 27 10
80 44 Butte 27 7
79 42 Deer Lodge 26 6
81 46 Dillon 27 8
86 52 Gardiner 30 11
78 43 Hebgen Lake Dam 26 6
85 53 Helena 29 12
81 40 Sula 27 5
81 49 Virginia City 27 9
78 36 West Yellowstone 26 2

South - Central Montana

August temperatures: daily averages
High °F Low °F Place High °C Low °C
87 57 Bighorn Lake, Yellowtail Dam 31 14
86 58 Billings 30 14
71 38 Cooke City 22 3
74 50 Mystic Lake 23 10
81 49 Red Lodge 27 9

Eastern Montana

Average August temperatures
High °F Low °F Place High °C Low °C
87 54 Culbertson 30 12
85 51 Elwell Lake, Tiber Dam 29 11
88 57 Fort Peck Lake Dam 31 14
85 57 Glasgow 29 14
87 58 Glendive 31 14
83 50 Great Falls 28 10
85 52 Havre City 29 11
81 50 Lewistown 27 10
87 58 Miles City 31 14
Reference

NOAA National Centers for Environmental Information (NCEI). Climate Normals.

Montana Temperatures
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