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Indianapolis August Weather

Averages and records for weather in Indianapolis, Indiana in the month of August.

Typical Indianapolis August Weather 1991–2020
Average daily high	84.4 °F
Average daily low	65.1 °F
Average monthly precipitation	3.2 inches
Average monthly snow	none
Daily chance of precipitation	26.9%
Daily chance of snow	0%

Indianapolis August Weather Records 1901–2024
Highest temperature	106 °F	August 22, 1936
Lowest temperature	39 °F	August 30, 1946
Highest daily low	80 °F	August 19, 1936
Lowest daily high	59 °F	August 29, 1917
Hottest average high temperature	94.3 °F	1936
Coldest average high temperature	75.8 °F	1915
Most daily precipitation	4.5 inches	August 6, 1976
Most monthly precipitation	9.8 inches	1926
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	85.0	66.1	99	51
August 2	84.9	66.0	97	46
August 3	84.8	65.9	100	45
August 4	84.7	65.8	101	45
August 5	84.6	65.7	101	47
August 6	84.6	65.6	100	49
August 7	84.5	65.5	98	46
August 8	84.5	65.4	100	46
August 9	84.5	65.4	101	45
August 10	84.4	65.3	101	49
August 11	84.4	65.2	100	48
August 12	84.4	65.2	101	44
August 13	84.5	65.2	103	46
August 14	84.5	65.2	100	47
August 15	84.5	65.2	98	45
August 16	84.4	65.2	102	44
August 17	84.3	65.1	102	45
August 18	84.1	65.0	98	45
August 19	84.0	64.9	103	47
August 20	84.1	64.8	102	46
August 21	84.1	64.7	104	44
August 22	84.0	64.5	106	43
August 23	83.9	64.4	100	43
August 24	83.8	64.2	101	43
August 25	83.7	64.0	99	40
August 26	83.5	63.9	97	42
August 27	83.4	63.7	97	42
August 28	83.2	63.5	96	43
August 29	83.1	63.3	99	41
August 30	83.0	63.1	97	39
August 31	82.8	62.9	97	39

Weather Station Details

Years	Station	Coordinates
1948–2024	Indianapolis International Airport	location
1901–1947	Whitestown	location