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Fairfield August Weather

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

Typical Fairfield August Weather 1991–2020
Average daily high	87.7 °F
Average daily low	64.3 °F
Average monthly precipitation	3.5 inches
Average monthly snow	none
Daily chance of precipitation	23.8%
Daily chance of snow	0%

Fairfield August Weather Records 1895–2024
Highest temperature	108 °F	August 4, 1918
Lowest temperature	43 °F	August 30, 1986
Highest daily low	81 °F	August 28, 1936
Lowest daily high	67 °F	August 12, 2004
Hottest average high temperature	96.6 °F	1936
Coldest average high temperature	81.5 °F	1967
Most daily precipitation	5.0 inches	August 26, 2004
Most monthly precipitation	8.9 inches	2004
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	88.1	65.5	101	51
August 2	88.0	65.4	103	51
August 3	87.9	65.2	104	50
August 4	87.8	65.1	108	46
August 5	87.7	65.0	107	49
August 6	87.6	64.9	106	48
August 7	87.6	64.7	104	47
August 8	87.6	64.7	106	48
August 9	87.6	64.6	106	50
August 10	87.5	64.5	102	51
August 11	87.6	64.4	104	52
August 12	87.6	64.4	104	47
August 13	87.7	64.3	100	44
August 14	87.8	64.3	100	45
August 15	87.8	64.3	105	46
August 16	87.7	64.3	102	47
August 17	87.6	64.3	102	53
August 18	87.5	64.2	104	50
August 19	87.4	64.1	105	49
August 20	87.4	64.0	103	50
August 21	87.3	63.9	103	45
August 22	87.3	63.7	102	47
August 23	87.2	63.5	102	47
August 24	87.1	63.3	105	47
August 25	86.9	63.2	104	48
August 26	86.7	63.0	106	48
August 27	86.6	62.8	100	46
August 28	86.5	62.6	102	46
August 29	86.4	62.4	101	43
August 30	86.3	62.2	99	43
August 31	86.1	62.0	102	47

Weather Station Details

Years	Station	Coordinates
1895–2024	Fairfield Radio WFIW	location