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Olney August Weather

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

Typical Olney August Weather 1991–2020
Average daily high	86.4 °F
Average daily low	64.1 °F
Average monthly precipitation	3.0 inches
Average monthly snow	none
Daily chance of precipitation	26.0%
Daily chance of snow	0%

Olney August Weather Records 1893–2024
Highest temperature	109 °F	August 26, 1943
Lowest temperature	41 °F	August 13, 1964
Highest daily low	80 °F	August 19, 1936
Lowest daily high	64 °F	August 30, 1917
Hottest average high temperature	97.6 °F	1936
Coldest average high temperature	78.5 °F	1915
Most daily precipitation	4.1 inches	August 3, 1924
Most monthly precipitation	11.2 inches	2000
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	86.9	65.5	101	46
August 2	86.8	65.4	102	47
August 3	86.8	65.2	107	47
August 4	86.7	65.1	106	50
August 5	86.6	65.0	106	51
August 6	86.5	64.8	106	51
August 7	86.4	64.6	107	48
August 8	86.4	64.5	109	48
August 9	86.4	64.5	109	49
August 10	86.4	64.4	101	51
August 11	86.3	64.3	104	48
August 12	86.3	64.2	102	48
August 13	86.4	64.2	102	41
August 14	86.4	64.2	100	45
August 15	86.5	64.2	101	44
August 16	86.4	64.1	102	45
August 17	86.3	64.1	105	52
August 18	86.2	64.1	109	48
August 19	86.1	64.0	108	49
August 20	86.1	63.9	104	48
August 21	86.1	63.8	106	46
August 22	86.0	63.6	106	46
August 23	86.0	63.4	101	48
August 24	85.9	63.2	106	48
August 25	85.8	63.0	105	47
August 26	85.7	62.9	109	44
August 27	85.5	62.7	101	48
August 28	85.4	62.5	105	47
August 29	85.3	62.3	101	44
August 30	85.2	62.2	99	44
August 31	85.1	62.0	102	41

Weather Station Details

Years	Station	Coordinates
1893–2024	Olney 2S	location