< Previous Month Next Month >

West Yellowstone August Weather

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

Typical West Yellowstone August Weather 1991–2020
Average daily high	78.5 °F
Average daily low	38.0 °F
Average monthly precipitation	1.0 inches
Daily chance of precipitation	16.7%

West Yellowstone August Weather Records 1924–2024
Highest temperature	96 °F	August 4, 1961
Lowest temperature	15 °F	August 17, 1928
Highest daily low	58 °F	August 11, 1983
Lowest daily high	46 °F	August 26, 1977
Hottest average high temperature	84.6 °F	1940
Coldest average high temperature	68.9 °F	1968
Most daily precipitation	2.3 inches	August 21, 1986
Most monthly precipitation	6.0 inches	1968

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	80.4	39.9	91	29
August 2	80.4	39.7	93	26
August 3	80.3	39.6	94	25
August 4	80.1	39.5	96	26
August 5	80.1	39.4	94	27
August 6	79.9	39.2	92	27
August 7	79.9	39.1	92	27
August 8	79.8	39.0	90	25
August 9	79.6	38.9	94	25
August 10	79.4	38.8	94	22
August 11	79.3	38.7	95	27
August 12	79.1	38.6	95	25
August 13	79.0	38.4	96	25
August 14	78.8	38.3	95	19
August 15	78.7	38.1	91	22
August 16	78.4	37.9	90	18
August 17	78.1	37.7	92	15
August 18	77.8	37.6	91	24
August 19	77.6	37.4	91	25
August 20	77.5	37.2	91	24
August 21	77.3	37.0	89	24
August 22	77.0	36.8	90	25
August 23	76.7	36.6	91	25
August 24	76.4	36.4	92	22
August 25	76.0	36.3	89	17
August 26	75.6	36.0	91	16
August 27	75.3	35.8	88	23
August 28	75.0	35.6	89	20
August 29	74.5	35.3	86	21
August 30	74.2	35.1	90	20
August 31	73.8	34.9	89	18

Weather Station Details

Years	Station	Coordinates
1997–2024	West Yellowstone	location
1924–1996	West Yellowstone	location