Windsor climate

Windsor Weather in September

NOAA 1991-2020 normals for Windsor, 0.5 km from Windsor

Average highs run from 82°F on September 1 to 74°F on September 30, and lows from 60°F to 50°F. Normal precipitation for the month is 2.97 in over about 7 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.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
78°F
Average low
55°F
Precipitation
2.97 in
Record high
99°FSep 1, 2011
Record low
34°FSep 25, 2001
Chance of a freeze
3%
Days of 90°F or more
3.5
Daylight
13 h 02 min to 11 h 48 min
Cloud cover
46%
Humidity
69%
Dew point
56°F
Wind
8.3 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 182°F60°F99°F 201141°F 200724%0%
Sep 282°F60°F98°F 201142°F 201724%0%
Sep 382°F59°F96°F 201149°F 202423%0%
Sep 482°F59°F97°F 202650°F 202423%0%
Sep 581°F59°F97°F 202648°F 200323%0%
Sep 681°F58°F94°F 199845°F 201123%0%
Sep 781°F58°F93°F 201545°F 202523%0%
Sep 881°F58°F94°F 200242°F 202423%0%
Sep 980°F58°F95°F 201344°F 202424%0%
Sep 1080°F57°F96°F 201346°F 201724%0%
Sep 1180°F57°F95°F 201344°F 201724%0%
Sep 1280°F57°F92°F 199845°F 200724%0%
Sep 1379°F56°F93°F 202540°F 201424%0%
Sep 1479°F56°F96°F 202540°F 201424%0%
Sep 1579°F56°F97°F 202636°F 200724%0%
Sep 1679°F55°F94°F 202642°F 199924%0%
Sep 1778°F55°F96°F 202644°F 199924%0%
Sep 1878°F55°F92°F 201843°F 202024%0%
Sep 1978°F54°F92°F 200539°F 202024%0%
Sep 2077°F54°F93°F 201739°F 200624%0%
Sep 2177°F53°F95°F 201740°F 199924%0%
Sep 2277°F53°F94°F 201739°F 199924%0%
Sep 2376°F53°F93°F 201740°F 201224%0%
Sep 2476°F52°F92°F 201736°F 201224%0%
Sep 2576°F52°F91°F 201734°F 200124%0%
Sep 2675°F52°F91°F 201738°F 200024%0%
Sep 2775°F51°F92°F 199842°F 201024%0%
Sep 2875°F51°F89°F 202537°F 202224%0%
Sep 2974°F51°F91°F 202538°F 202224%0%
Sep 3074°F50°F90°F 201939°F 200524%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.05101520251102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CDT).

September 1
sunrise 6:23 AM, sunset 7:25 PM
September 30
sunrise 6:50 AM, sunset 6:38 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00119354 (Windsor), public domain. Records: NOAA GHCN-Daily, station USW00053802, 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.