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Dubuque August Weather

Averages and records for weather in Dubuque, Iowa in the month of August.

Typical Dubuque August Weather 1991–2020
Average daily high	79.7 °F
Average daily low	60.2 °F
Average monthly precipitation	4.0 inches
Average monthly snow	none
Daily chance of precipitation	29.0%
Daily chance of snow	0%

Dubuque August Weather Records 1938–2024
Highest temperature	101 °F	August 11, 1941
Lowest temperature	40 °F	August 28, 1986
Highest daily low	77 °F	August 24, 2023
Lowest daily high	56 °F	August 25, 1987
Hottest average high temperature	89.3 °F	1947
Coldest average high temperature	74.8 °F	1986
Most daily precipitation	6.0 inches	August 21, 2002
Most monthly precipitation	9.9 inches	1987
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	80.9	61.5	100	51
August 2	80.7	61.3	98	50
August 3	80.6	61.2	98	48
August 4	80.4	61.1	97	43
August 5	80.3	60.9	95	47
August 6	80.2	60.8	95	49
August 7	80.2	60.7	95	46
August 8	80.2	60.6	98	47
August 9	80.1	60.6	96	47
August 10	80.0	60.5	96	50
August 11	80.0	60.5	101	49
August 12	80.0	60.4	94	47
August 13	80.0	60.5	93	45
August 14	79.9	60.4	93	46
August 15	79.8	60.4	98	45
August 16	79.6	60.3	99	47
August 17	79.4	60.1	99	48
August 18	79.3	59.9	95	46
August 19	79.3	59.8	99	47
August 20	79.3	59.7	96	44
August 21	79.2	59.6	97	41
August 22	79.1	59.4	96	49
August 23	79.0	59.3	97	45
August 24	78.9	59.1	98	45
August 25	78.6	58.8	92	42
August 26	78.4	58.7	95	44
August 27	78.3	58.4	93	44
August 28	78.2	58.2	97	40
August 29	78.0	58.0	99	43
August 30	77.9	57.8	95	45
August 31	77.6	57.6	96	42

Weather Station Details

Years	Station	Coordinates
1951–2024	Dubuque Regional Airport	location
1938–1950	Dubuque L&D 11	location