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Great Falls August Weather

Averages and records for weather in Great Falls, Montana in the month of August.

Typical Great Falls August Weather 1991–2020
Average daily high	83.2 °F
Average daily low	50.8 °F
Average monthly precipitation	1.2 inches
Average monthly snow	0.3 inches
Daily chance of precipitation	21.9%
Daily chance of snow	0.22%

Great Falls August Weather Records 1892–2024
Highest temperature	106 °F	August 24, 1969
Lowest temperature	30 °F	August 24, 1992
Highest daily low	72 °F	August 31, 1940
Lowest daily high	38 °F	August 22, 1992
Hottest average high temperature	92.9 °F	1971
Coldest average high temperature	72.7 °F	1993
Most daily precipitation	2.9 inches	August 23, 2014
Most monthly precipitation	5.3 inches	1933
Most daily snow	6.6 inches	August 23, 1992
Most monthly snow	8.3 inches	1992

Note: Daily averages are a moving average which includes 14 days before and after

Day	Average (°F)		Record (°F)
Day	High	Low	High	Low
August 1	85.5	52.6	101	38
August 2	85.3	52.5	99	41
August 3	85.2	52.4	100	40
August 4	85.1	52.4	102	41
August 5	85.1	52.3	106	42
August 6	85.0	52.2	104	41
August 7	84.9	52.0	101	35
August 8	84.7	52.0	102	41
August 9	84.6	51.9	102	38
August 10	84.4	51.8	104	40
August 11	84.2	51.6	101	37
August 12	84.0	51.5	105	38
August 13	83.8	51.3	99	40
August 14	83.6	51.1	101	36
August 15	83.4	51.0	101	40
August 16	83.2	50.8	101	39
August 17	83.0	50.6	101	36
August 18	82.8	50.5	101	40
August 19	82.7	50.3	97	40
August 20	82.6	50.1	99	39
August 21	82.2	49.9	99	38
August 22	81.8	49.6	98	32
August 23	81.5	49.4	102	32
August 24	81.2	49.2	106	30
August 25	80.8	48.9	100	31
August 26	80.4	48.7	96	35
August 27	80.1	48.5	98	39
August 28	79.7	48.2	99	35
August 29	79.3	47.9	97	34
August 30	78.9	47.7	97	35
August 31	78.5	47.4	98	34

Weather Station Details

Years	Station	Coordinates
1937–2024	Great Falls International Airport	location
1892–1937	Great Falls 16th Street	location