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Boulder August Weather

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

Typical Boulder August Weather 1991–2020
Average daily high	86.0 °F
Average daily low	56.1 °F
Average monthly precipitation	1.7 inches
Average monthly snow	none
Daily chance of precipitation	33.8%
Daily chance of snow	0%

Boulder August Weather Records 1893–2024
Highest temperature	102 °F	August 24, 1936
Lowest temperature	40 °F	August 28, 2004
Highest daily low	77 °F	August 18, 1924
Lowest daily high	54 °F	August 7, 1939
Hottest average high temperature	91.6 °F	2011
Coldest average high temperature	77.4 °F	1915
Most daily precipitation	3.1 inches	August 3, 1951
Most monthly precipitation	7.5 inches	1951
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	87.1	57.4	100	44
August 2	86.9	57.3	99	41
August 3	86.8	57.2	98	49
August 4	86.6	57.1	99	45
August 5	86.4	56.9	98	47
August 6	86.4	56.8	101	50
August 7	86.3	56.7	99	47
August 8	86.3	56.6	101	46
August 9	86.2	56.6	101	45
August 10	86.2	56.5	97	40
August 11	86.2	56.5	97	47
August 12	86.2	56.4	99	47
August 13	86.2	56.4	97	44
August 14	86.1	56.3	99	48
August 15	86.0	56.2	97	47
August 16	86.0	56.1	100	47
August 17	85.9	56.0	97	45
August 18	85.8	55.8	98	48
August 19	85.8	55.7	96	43
August 20	85.8	55.6	98	43
August 21	85.7	55.5	98	44
August 22	85.6	55.4	97	46
August 23	85.4	55.2	98	44
August 24	85.2	55.0	102	45
August 25	85.0	54.7	97	43
August 26	84.8	54.5	96	44
August 27	84.6	54.3	96	42
August 28	84.4	54.2	96	40
August 29	84.2	54.0	97	44
August 30	83.9	53.8	96	46
August 31	83.7	53.5	96	42

Weather Station Details

Years	Station	Coordinates
1893–2024	Boulder	location