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Grand Junction August Weather

Averages and records for weather in Grand Junction, Colorado in the month of August.

Typical Grand Junction August Weather 1991–2020
Average daily high	90.7 °F
Average daily low	62.0 °F
Average monthly precipitation	0.9 inches
Average monthly snow	none
Daily chance of precipitation	21.1%
Daily chance of snow	0%

Grand Junction August Weather Records 1900–2024
Highest temperature	103 °F	August 2, 2020
Lowest temperature	43 °F	August 23, 1968
Highest daily low	76 °F	August 6, 1983
Lowest daily high	64 °F	August 30, 1957
Hottest average high temperature	97.0 °F	2020
Coldest average high temperature	83.5 °F	1925
Most daily precipitation	1.4 inches	August 24, 1921
Most monthly precipitation	3.7 inches	1921
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	92.9	63.7	102	51
August 2	92.7	63.6	103	54
August 3	92.6	63.5	102	53
August 4	92.5	63.3	102	54
August 5	92.3	63.2	102	53
August 6	92.1	63.1	103	55
August 7	92.0	62.9	102	54
August 8	91.9	62.8	102	52
August 9	91.7	62.7	102	52
August 10	91.6	62.6	101	50
August 11	91.5	62.6	102	52
August 12	91.3	62.5	101	48
August 13	91.1	62.4	102	52
August 14	90.9	62.2	100	52
August 15	90.8	62.1	99	45
August 16	90.7	61.9	100	48
August 17	90.5	61.8	101	45
August 18	90.3	61.6	101	47
August 19	90.3	61.4	98	49
August 20	90.2	61.3	100	46
August 21	90.2	61.1	99	47
August 22	90.0	61.0	99	50
August 23	89.8	60.8	99	43
August 24	89.5	60.6	101	45
August 25	89.3	60.4	99	48
August 26	89.0	60.1	99	49
August 27	88.6	59.9	98	45
August 28	88.2	59.6	97	48
August 29	87.9	59.3	98	49
August 30	87.5	59.1	99	50
August 31	87.2	58.8	98	45

Weather Station Details

Years	Station	Coordinates
1900–2024	Grand Junction Walker Field	location