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Hyannis August Weather

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

Typical Hyannis August Weather 1991–2020
Average daily high	78.0 °F
Average daily low	64.1 °F
Average monthly precipitation	3.2 inches
Average monthly snow	none
Daily chance of precipitation	24.6%
Daily chance of snow	0%

Hyannis August Weather Records 1893–2024
Highest temperature	100 °F	August 28, 1948
Lowest temperature	34 °F	August 31, 1965
Highest daily low	79 °F	August 12, 1896
Lowest daily high	58 °F	August 26, 1908
Hottest average high temperature	82.2 °F	1948
Coldest average high temperature	70.8 °F	1903
Most daily precipitation	5.3 inches	August 23, 1929
Most monthly precipitation	14.1 inches	1946
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	79.4	65.4	90	41
August 2	79.3	65.3	89	44
August 3	79.1	65.2	90	42
August 4	79.1	65.2	89	44
August 5	79.0	65.2	96	48
August 6	78.8	65.1	89	44
August 7	78.7	65.0	90	43
August 8	78.7	64.9	92	49
August 9	78.6	64.9	97	45
August 10	78.6	64.8	99	38
August 11	78.5	64.7	95	45
August 12	78.5	64.5	91	45
August 13	78.3	64.4	90	48
August 14	78.2	64.2	88	43
August 15	78.1	64.2	93	42
August 16	78.0	64.0	89	40
August 17	77.9	63.9	89	50
August 18	77.7	63.7	88	42
August 19	77.6	63.4	92	42
August 20	77.4	63.3	91	43
August 21	77.2	63.1	91	42
August 22	77.2	63.0	88	39
August 23	77.1	62.9	94	39
August 24	76.9	62.7	89	39
August 25	76.8	62.6	88	39
August 26	76.7	62.4	97	40
August 27	76.5	62.3	99	48
August 28	76.3	62.0	100	45
August 29	76.1	61.7	99	42
August 30	75.9	61.5	94	42
August 31	75.7	61.3	94	34

Weather Station Details

Years	Station	Coordinates
1893–2024	Hyannis	location