Falmouth climate

Falmouth Weather in September

NOAA 1991-2020 normals for Edgartown, 20.2 km from Falmouth

Average highs run from 78°F on September 1 to 69°F on September 30, and lows from 62°F to 54°F. Normal precipitation for the month is 3.89 in over about 9 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 Falmouth, in °F, with the record for each date.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
74°F
Average low
58°F
Precipitation
3.89 in
Record high
87°FSep 10, 2016
Record low
35°FSep 20, 2014
Chance of a freeze
0%
Daylight
13 h 06 min to 11 h 48 min
Cloud cover
53%
Humidity
79%
Dew point
59°F
Wind
12.8 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 178°F62°F83°F 201550°F 201727%0%
Sep 278°F62°F79°F 201442°F 201727%0%
Sep 377°F62°F85°F 201441°F 201727%0%
Sep 477°F62°F81°F 201548°F 202428%0%
Sep 577°F61°F82°F 202049°F 202428%0%
Sep 677°F61°F81°F 201148°F 201328%0%
Sep 777°F61°F83°F 201843°F 201328%0%
Sep 876°F61°F86°F 202344°F 201328%0%
Sep 976°F61°F86°F 201544°F 201329%0%
Sep 1076°F60°F87°F 201644°F 201329%0%
Sep 1176°F60°F80°F 201647°F 201129%0%
Sep 1275°F60°F84°F 201346°F 201229%0%
Sep 1375°F59°F79°F 201344°F 202530%0%
Sep 1475°F59°F78°F 201142°F 201930%0%
Sep 1574°F59°F79°F 201146°F 201430%0%
Sep 1674°F59°F80°F 202142°F 201631%0%
Sep 1774°F58°F79°F 201541°F 202231%0%
Sep 1873°F58°F80°F 201538°F 201331%0%
Sep 1973°F58°F80°F 201539°F 201332%0%
Sep 2073°F57°F78°F 201535°F 201432%0%
Sep 2173°F57°F75°F 201336°F 201432%0%
Sep 2272°F57°F75°F 201448°F 202533%0%
Sep 2372°F56°F76°F 201640°F 201433%0%
Sep 2472°F56°F77°F 201640°F 201434%0%
Sep 2571°F56°F76°F 202138°F 201234%0%
Sep 2671°F55°F77°F 201738°F 201234%0%
Sep 2771°F55°F77°F 201739°F 201634%0%
Sep 2870°F54°F77°F 201739°F 201535%0%
Sep 2970°F54°F77°F 201439°F 201335%0%
Sep 3069°F54°F77°F 201540°F 201335%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Falmouth, in percent, and of at least 0.1 inch of snowfall.0102030401102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (EDT).

September 1
sunrise 6:09 AM, sunset 7:15 PM
September 30
sunrise 6:38 AM, sunset 6:26 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00192501 (Edgartown), public domain. Records: NOAA GHCN-Daily, station USC00192372, 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.