Nantucket climate

Nantucket Weather in September

NOAA 1991-2020 normals for Nantucket Mem AP, 4.7 km from Nantucket

Average highs run from 74°F on September 1 to 67°F on September 30, and lows from 60°F to 53°F. Normal precipitation for the month is 3.59 in over about 13 wet days.

September day by day

The normal high and low for each date, and the record, in °F.

Normal daily high and low temperature at Nantucket, in °F, with the record for each date.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
70°F
Average low
57°F
Precipitation
3.59 in
Record high
86°FSep 1, 2010
Record low
34°FSep 22, 1973
Chance of a freeze
0%
Daylight
13 h 06 min to 11 h 48 min
Cloud cover
57%
Humidity
84%
Dew point
59°F
Wind
13.9 mph

Every day of the month

A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.

DateNormal highNormal lowRecord highRecord lowChance wetChance of snow
Sep 174°F60°F86°F 201049°F 197542%0%
Sep 274°F60°F83°F 196649°F 202342%0%
Sep 373°F60°F85°F 197747°F 197042%0%
Sep 473°F60°F86°F 201849°F 194942%0%
Sep 573°F59°F84°F 195947°F 196542%0%
Sep 673°F59°F86°F 197745°F 200042%0%
Sep 773°F59°F80°F 202342°F 200042%0%
Sep 872°F59°F83°F 197145°F 195242%0%
Sep 972°F59°F86°F 197143°F 195242%0%
Sep 1072°F58°F85°F 202247°F 200341%0%
Sep 1172°F58°F86°F 202246°F 196641%0%
Sep 1271°F58°F82°F 197145°F 196641%0%
Sep 1371°F58°F81°F 197145°F 202541%0%
Sep 1471°F58°F81°F 197147°F 196441%0%
Sep 1571°F57°F81°F 197144°F 196842%0%
Sep 1670°F57°F85°F 197141°F 196642%0%
Sep 1770°F57°F77°F 202140°F 196642%0%
Sep 1870°F57°F79°F 202243°F 195042%0%
Sep 1970°F56°F78°F 196744°F 195642%0%
Sep 2069°F56°F80°F 201542°F 196942%0%
Sep 2169°F56°F79°F 197135°F 197342%0%
Sep 2269°F56°F79°F 201634°F 197342%0%
Sep 2369°F55°F80°F 198041°F 197242%0%
Sep 2468°F55°F78°F 200938°F 197642%0%
Sep 2568°F55°F77°F 202137°F 197642%0%
Sep 2668°F55°F79°F 201134°F 197342%0%
Sep 2768°F54°F77°F 201738°F 196642%0%
Sep 2867°F54°F77°F 202136°F 196542%0%
Sep 2967°F54°F77°F 197137°F 196542%0%
Sep 3067°F53°F79°F 197137°F 196542%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Nantucket, in percent, and of at least 0.1 inch of snowfall.010203040501102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (EDT).

September 1
sunrise 6:07 AM, sunset 7:13 PM
September 30
sunrise 6:36 AM, sunset 6:24 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00014756 (Nantucket Mem AP), public domain. Records: NOAA GHCN-Daily, station USW00014756, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.