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Boston August Weather

Averages and records for weather in Boston, Massachusetts in the month of August.

Typical Boston August Weather 1991–2020
Average daily high	80.7 °F
Average daily low	65.3 °F
Average monthly precipitation	3.1 inches
Average monthly snow	none
Daily chance of precipitation	29.1%
Daily chance of snow	0%

Boston August Weather Records 1893–2024
Highest temperature	102 °F	August 2, 1975
Lowest temperature	46 °F	August 25, 1940
Highest daily low	83 °F	August 2, 1975
Lowest daily high	58 °F	August 2, 1946
Hottest average high temperature	85.2 °F	2022
Coldest average high temperature	71.5 °F	1903
Most daily precipitation	7.1 inches	August 19, 1955
Most monthly precipitation	17.1 inches	1955
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	82.1	66.6	98	55
August 2	82.0	66.5	102	54
August 3	81.9	66.5	98	55
August 4	81.9	66.4	98	52
August 5	81.7	66.3	100	54
August 6	81.5	66.2	97	53
August 7	81.4	66.1	98	55
August 8	81.3	66.1	98	52
August 9	81.3	66.0	99	53
August 10	81.2	66.0	101	53
August 11	81.1	65.9	99	55
August 12	81.0	65.7	101	53
August 13	80.9	65.6	100	53
August 14	80.8	65.5	101	52
August 15	80.7	65.5	98	52
August 16	80.6	65.3	97	54
August 17	80.5	65.2	97	51
August 18	80.2	65.0	95	53
August 19	80.0	64.8	95	53
August 20	79.8	64.6	98	52
August 21	79.8	64.5	97	53
August 22	79.6	64.4	93	47
August 23	79.5	64.2	93	53
August 24	79.3	64.0	96	51
August 25	79.1	63.9	96	46
August 26	78.9	63.7	99	50
August 27	78.7	63.6	100	51
August 28	78.6	63.3	99	50
August 29	78.3	63.1	98	47
August 30	78.2	62.9	99	48
August 31	77.9	62.7	97	47

Weather Station Details

Years	Station	Coordinates
1936–2024	Boston Logan International Airport	location
1893–1935	Boston City	location