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Nantucket August Weather

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

Typical Nantucket August Weather 1991–2020
Average daily high	76.0 °F
Average daily low	62.9 °F
Average monthly precipitation	2.9 inches
Daily chance of precipitation	43.3%

Nantucket August Weather Records 1948–2024
Highest temperature	100 °F	August 2, 1975
Lowest temperature	39 °F	August 31, 1965
Highest daily low	77 °F	August 9, 2022
Lowest daily high	60 °F	August 21, 1956
Hottest average high temperature	80.9 °F	2021
Coldest average high temperature	70.8 °F	1982
Most daily precipitation	3.6 inches	August 29, 2009
Most monthly precipitation	6.7 inches	1967

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	76.5	63.9	88	53
August 2	76.4	63.9	100	52
August 3	76.4	63.8	97	52
August 4	76.4	63.8	84	52
August 5	76.4	63.8	88	45
August 6	76.3	63.7	86	43
August 7	76.3	63.7	85	53
August 8	76.2	63.7	89	54
August 9	76.2	63.6	91	52
August 10	76.2	63.5	92	50
August 11	76.2	63.4	88	54
August 12	76.1	63.3	87	53
August 13	76.1	63.1	86	50
August 14	76.0	63.1	87	50
August 15	76.0	63.0	84	46
August 16	75.9	63.0	87	45
August 17	75.9	62.9	83	51
August 18	75.8	62.7	84	47
August 19	75.6	62.5	83	46
August 20	75.5	62.3	84	44
August 21	75.4	62.3	86	49
August 22	75.3	62.1	92	46
August 23	75.2	62.0	84	49
August 24	75.1	61.8	83	49
August 25	75.0	61.7	89	45
August 26	74.9	61.6	92	48
August 27	74.7	61.3	92	48
August 28	74.6	61.1	95	51
August 29	74.4	60.9	86	50
August 30	74.3	60.7	90	42
August 31	74.1	60.5	87	39

Weather Station Details

Years	Station	Coordinates
1948–2024	Nantucket Memorial Airport	location