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Nantucket September Weather

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

Typical Nantucket September Weather 1991–2020
Average daily high	70.9 °F
Average daily low	57.3 °F
Average monthly precipitation	3.6 inches
Daily chance of precipitation	41.7%

Nantucket September Weather Records 1948–2024
Highest temperature	86 °F	September 11, 2022
Lowest temperature	34 °F	September 26, 1973
Highest daily low	73 °F	September 8, 1971
Lowest daily high	54 °F	September 23, 1963
Hottest average high temperature	77.4 °F	1971
Coldest average high temperature	65.2 °F	1963
Most daily precipitation	5.0 inches	September 3, 1972
Most monthly precipitation	11.1 inches	2017

Note: Daily averages are a moving average which includes 14 days before and after

Day	Average (°F)		Record (°F)
Day	High	Low	High	Low
September 1	73.9	60.3	86	49
September 2	73.7	60.0	83	49
September 3	73.5	59.8	85	47
September 4	73.3	59.6	86	49
September 5	73.1	59.3	84	47
September 6	72.9	59.0	86	45
September 7	72.7	58.9	80	42
September 8	72.6	58.8	83	45
September 9	72.4	58.6	86	43
September 10	72.2	58.4	85	47
September 11	72.0	58.2	86	46
September 12	71.8	58.0	82	45
September 13	71.6	57.9	81	46
September 14	71.4	57.7	81	47
September 15	71.1	57.5	81	44
September 16	70.8	57.3	85	41
September 17	70.6	57.1	77	40
September 18	70.4	56.9	79	43
September 19	70.1	56.6	78	44
September 20	69.9	56.4	80	42
September 21	69.6	56.3	79	35
September 22	69.3	55.9	79	34
September 23	69.0	55.6	80	41
September 24	68.7	55.3	78	38
September 25	68.5	55.1	77	37
September 26	68.2	54.9	79	34
September 27	68.0	54.7	77	38
September 28	67.7	54.5	77	36
September 29	67.4	54.1	77	37
September 30	67.1	53.8	79	37

Weather Station Details

Years	Station	Coordinates
1948–2024	Nantucket Memorial Airport	location