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Rockford August Weather

Averages and records for weather in Rockford, Illinois in the month of August.

Typical Rockford August Weather 1991–2020
Average daily high	82.1 °F
Average daily low	61.2 °F
Average monthly precipitation	4.2 inches
Average monthly snow	none
Daily chance of precipitation	30.1%
Daily chance of snow	0%

Rockford August Weather Records 1893–2024
Highest temperature	104 °F	August 16, 1988
Lowest temperature	35 °F	August 30, 1915
Highest daily low	80 °F	August 6, 1918
Lowest daily high	59 °F	August 25, 1987
Hottest average high temperature	93.6 °F	1947
Coldest average high temperature	76.1 °F	1912
Most daily precipitation	5.7 inches	August 14, 1987
Most monthly precipitation	14.0 inches	2007
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	83.3	62.6	101	48
August 2	83.2	62.4	99	44
August 3	83.1	62.3	100	43
August 4	82.9	62.2	99	46
August 5	82.8	62.0	104	47
August 6	82.7	61.9	102	47
August 7	82.6	61.8	101	49
August 8	82.6	61.7	99	42
August 9	82.5	61.6	100	43
August 10	82.5	61.6	98	48
August 11	82.5	61.5	101	47
August 12	82.4	61.5	99	44
August 13	82.4	61.5	96	46
August 14	82.3	61.5	97	43
August 15	82.2	61.4	99	44
August 16	82.0	61.3	104	44
August 17	81.8	61.1	102	46
August 18	81.7	61.0	101	45
August 19	81.7	60.9	100	44
August 20	81.6	60.8	100	47
August 21	81.5	60.6	100	45
August 22	81.4	60.4	101	41
August 23	81.3	60.3	101	42
August 24	81.2	60.1	102	41
August 25	81.0	59.9	97	41
August 26	80.8	59.7	97	42
August 27	80.7	59.5	97	40
August 28	80.5	59.2	97	38
August 29	80.4	59.0	98	39
August 30	80.2	58.8	99	35
August 31	80.0	58.5	101	41

Weather Station Details

Years	Station	Coordinates
1951–2024	Greater Rockford Airport	location
1893–1950	Rockford	location