Colchester climate

Colchester Weather in September

NOAA 1991-2020 normals for La Harpe, 23 km from Colchester

Average highs run from 81°F on September 1 to 72°F on September 30, and lows from 59°F to 48°F. Normal precipitation for the month is 3.83 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 Colchester, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
77°F
Average low
54°F
Precipitation
3.83 in
Record high
100°FSep 2, 2011
Record low
34°FSep 15, 2007
Chance of a freeze
5%
Days of 90°F or more
3.1
Daylight
13 h 04 min to 11 h 48 min
Cloud cover
46%
Humidity
69%
Dew point
55°F
Wind
8.9 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 181°F59°F95°F 201147°F 200922%0%
Sep 281°F59°F100°F 201148°F 200922%0%
Sep 380°F59°F97°F 201147°F 201722%0%
Sep 480°F58°F95°F 201151°F 201022%0%
Sep 580°F58°F95°F 201550°F 201022%0%
Sep 680°F58°F92°F 201443°F 201122%0%
Sep 780°F57°F95°F 201543°F 201122%0%
Sep 879°F57°F92°F 200543°F 202422%0%
Sep 979°F57°F90°F 200543°F 202422%0%
Sep 1079°F56°F99°F 201346°F 202422%0%
Sep 1178°F56°F98°F 201348°F 200822%0%
Sep 1278°F56°F93°F 201343°F 200722%0%
Sep 1378°F55°F93°F 200537°F 201422%0%
Sep 1478°F55°F91°F 200537°F 201422%0%
Sep 1577°F54°F88°F 201834°F 200722%0%
Sep 1677°F54°F89°F 201737°F 201122%0%
Sep 1777°F54°F90°F 201842°F 201422%0%
Sep 1876°F53°F91°F 200743°F 201222%0%
Sep 1976°F53°F92°F 200743°F 201223%0%
Sep 2076°F52°F93°F 201338°F 200623%0%
Sep 2175°F52°F95°F 201738°F 200623%0%
Sep 2275°F52°F92°F 201044°F 201423%0%
Sep 2374°F51°F94°F 201735°F 201223%0%
Sep 2474°F51°F93°F 201734°F 201223%0%
Sep 2574°F50°F92°F 200734°F 201223%0%
Sep 2673°F50°F90°F 201741°F 200323%0%
Sep 2773°F50°F88°F 201741°F 201823%0%
Sep 2872°F49°F89°F 202139°F 202223%0%
Sep 2972°F49°F85°F 201438°F 202223%0%
Sep 3072°F48°F87°F 201436°F 200323%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Colchester, 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 6:31 AM, sunset 7:35 PM
September 30
sunrise 6:59 AM, sunset 6:47 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00114823 (La Harpe), public domain. Records: NOAA GHCN-Daily, station USC00116970, 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.