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Helena August Weather

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

Typical Helena August Weather 1991–2020
Average daily high	84.8 °F
Average daily low	52.5 °F
Average monthly precipitation	1.0 inches
Average monthly snow	0.3 inches
Daily chance of precipitation	20.4%
Daily chance of snow	0.31%

Helena August Weather Records 1893–2024
Highest temperature	105 °F	August 24, 1969
Lowest temperature	28 °F	August 25, 1992
Highest daily low	72 °F	August 1, 1900
Lowest daily high	44 °F	August 23, 1992
Hottest average high temperature	92.0 °F	2001
Coldest average high temperature	72.2 °F	1899
Most daily precipitation	1.9 inches	August 20, 1933
Most monthly precipitation	4.2 inches	1974
Most daily snow	3.1 inches	August 23, 1992
Most monthly snow	6.2 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	87.2	54.8	102	42
August 2	87.1	54.7	100	40
August 3	86.9	54.6	102	43
August 4	86.8	54.5	102	41
August 5	86.8	54.4	103	42
August 6	86.7	54.3	103	43
August 7	86.5	54.1	100	38
August 8	86.4	53.9	99	36
August 9	86.2	53.8	102	39
August 10	86.0	53.7	102	36
August 11	85.8	53.5	98	40
August 12	85.7	53.2	103	41
August 13	85.5	53.1	98	39
August 14	85.3	52.9	99	36
August 15	85.1	52.8	102	40
August 16	84.8	52.6	99	42
August 17	84.6	52.3	102	38
August 18	84.4	52.2	100	39
August 19	84.3	51.9	98	34
August 20	84.2	51.7	96	39
August 21	83.9	51.6	95	38
August 22	83.5	51.4	97	33
August 23	83.2	51.1	98	33
August 24	82.9	50.9	105	33
August 25	82.5	50.6	97	28
August 26	82.1	50.4	97	35
August 27	81.8	50.1	98	37
August 28	81.5	49.9	97	36
August 29	81.1	49.6	99	37
August 30	80.7	49.3	96	34
August 31	80.3	49.1	97	32

Weather Station Details

Years	Station	Coordinates
1939–2024	Helena Regional Airport	location
1893–1938	Helna	location