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Boulder July Weather

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

Typical Boulder July Weather 1991–2020
Average daily high	87.9 °F
Average daily low	57.5 °F
Average monthly precipitation	1.8 inches
Average monthly snow	none
Daily chance of precipitation	34.2%
Daily chance of snow	0%

Boulder July Weather Records 1893–2024
Highest temperature	104 °F	July 11, 1954
Lowest temperature	40 °F	July 4, 1921
Highest daily low	76 °F	July 11, 1954
Lowest daily high	56 °F	July 4, 1972
Hottest average high temperature	93.4 °F	2002
Coldest average high temperature	77.2 °F	1906
Most daily precipitation	4.8 inches	July 31, 1919
Most monthly precipitation	7.5 inches	1919
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
July 1	86.5	55.4	101	45
July 2	86.7	55.6	99	45
July 3	86.9	55.8	98	43
July 4	87.1	55.9	98	40
July 5	87.4	56.2	99	42
July 6	87.6	56.4	100	44
July 7	87.7	56.5	100	41
July 8	87.9	56.7	100	44
July 9	87.9	56.9	99	46
July 10	88.0	57.0	100	46
July 11	88.1	57.2	104	44
July 12	88.0	57.3	103	47
July 13	88.0	57.4	102	44
July 14	88.0	57.5	97	47
July 15	88.0	57.5	100	47
July 16	87.9	57.6	100	47
July 17	87.9	57.7	98	46
July 18	87.9	57.7	100	49
July 19	87.9	57.7	100	46
July 20	87.8	57.8	100	45
July 21	87.8	57.8	101	48
July 22	87.7	57.8	102	47
July 23	87.6	57.8	99	47
July 24	87.6	57.8	101	49
July 25	87.6	57.8	98	49
July 26	87.6	57.8	98	48
July 27	87.5	57.8	101	48
July 28	87.4	57.8	100	52
July 29	87.3	57.7	100	46
July 30	87.3	57.6	98	45
July 31	87.2	57.6	100	47

Weather Station Details

Years	Station	Coordinates
1893–2024	Boulder	location