Windsor climate

Windsor Weather in September

NOAA 1991-2020 normals for Newport, 20 km from Windsor

Average highs run from 76°F on September 1 to 65°F on September 30, and lows from 52°F to 41°F. Normal precipitation for the month is 3.53 in over about 11 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 Windsor, in °F, with the record for each date.020406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
71°F
Average low
47°F
Precipitation
3.53 in
Record high
95°FSep 1, 2010
Record low
20°FSep 24, 1963
Chance of a freeze
44%
Daylight
13 h 11 min to 11 h 46 min
Cloud cover
58%
Humidity
81%
Dew point
52°F
Wind
3.8 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 176°F52°F95°F 201038°F 197035%0%
Sep 276°F51°F94°F 201036°F 201735%0%
Sep 376°F51°F92°F 199938°F 197035%0%
Sep 475°F51°F91°F 199939°F 196335%0%
Sep 575°F50°F91°F 201834°F 200035%0%
Sep 675°F50°F93°F 202335°F 196235%0%
Sep 774°F50°F92°F 202333°F 196236%0%
Sep 874°F49°F92°F 200239°F 196236%0%
Sep 974°F49°F95°F 200236°F 201336%0%
Sep 1073°F49°F93°F 200234°F 197836%0%
Sep 1173°F48°F93°F 201334°F 196336%0%
Sep 1273°F48°F88°F 198236°F 196536%0%
Sep 1372°F48°F87°F 198232°F 196336%0%
Sep 1472°F47°F87°F 200528°F 196336%0%
Sep 1572°F47°F85°F 202431°F 196337%0%
Sep 1671°F47°F88°F 201830°F 196437%0%
Sep 1771°F46°F86°F 201834°F 201337%0%
Sep 1870°F46°F86°F 201834°F 202037%0%
Sep 1970°F45°F87°F 202429°F 202037%0%
Sep 2069°F45°F90°F 198328°F 197937%0%
Sep 2169°F45°F89°F 196527°F 196237%0%
Sep 2269°F44°F90°F 196528°F 202038%0%
Sep 2368°F44°F86°F 201727°F 196338%0%
Sep 2468°F43°F92°F 201720°F 196338%0%
Sep 2567°F43°F90°F 201724°F 196338%0%
Sep 2667°F43°F89°F 201730°F 196639%0%
Sep 2766°F42°F89°F 201726°F 196539%0%
Sep 2866°F42°F86°F 202524°F 196539%0%
Sep 2965°F41°F83°F 202525°F 200039%0%
Sep 3065°F41°F82°F 198628°F 198139%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Windsor, 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 6:14 AM, sunset 7:25 PM
September 30
sunrise 6:46 AM, sunset 6:32 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00275868 (Newport), public domain. Records: NOAA GHCN-Daily, station USW00094765, 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.