< Previous Month Next Month >

Missoula August Weather

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

Typical Missoula August Weather 1991–2020
Average daily high	85.0 °F
Average daily low	50.2 °F
Average monthly precipitation	0.8 inches
Average monthly snow	none
Daily chance of precipitation	20.6%
Daily chance of snow	0%

Missoula August Weather Records 1893–2024
Highest temperature	105 °F	August 4, 1961
Lowest temperature	25 °F	August 19, 1901
Highest daily low	68 °F	August 10, 2022
Lowest daily high	49 °F	August 23, 1992
Hottest average high temperature	92.8 °F	2022
Coldest average high temperature	75.1 °F	1899
Most daily precipitation	2.0 inches	August 7, 2009
Most monthly precipitation	3.3 inches	1985
Most daily snow	none	-
Most monthly snow	none	-

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	87.7	52.3	103	30
August 2	87.6	52.2	102	37
August 3	87.6	52.2	104	39
August 4	87.5	52.1	105	37
August 5	87.5	52.0	103	40
August 6	87.3	51.9	99	36
August 7	87.2	51.8	98	34
August 8	87.0	51.6	100	36
August 9	86.8	51.5	103	35
August 10	86.5	51.3	104	37
August 11	86.2	51.1	100	39
August 12	86.0	50.9	100	38
August 13	85.8	50.7	100	40
August 14	85.6	50.5	100	32
August 15	85.3	50.4	103	33
August 16	85.1	50.2	100	35
August 17	84.8	50.0	101	38
August 18	84.5	49.8	100	39
August 19	84.3	49.5	101	25
August 20	84.0	49.3	99	36
August 21	83.7	49.1	100	36
August 22	83.4	48.9	100	35
August 23	83.0	48.7	103	37
August 24	82.6	48.4	102	32
August 25	82.1	48.2	99	29
August 26	81.7	47.9	99	36
August 27	81.4	47.7	99	33
August 28	81.1	47.4	97	32
August 29	80.7	47.2	94	32
August 30	80.3	46.9	97	33
August 31	80.0	46.6	99	36

Weather Station Details

Years	Station	Coordinates
1948–2024	Missoula International Airport	location
1893–1947	Missoula 6 NW WFO	location