Jersey County climate

Jersey County Weather in September

NOAA 1991-2020 normals for Jerseyville 2 Sw, 2.2 km from Jersey County

Average highs run from 83°F on September 1 to 74°F on September 30, and lows from 60°F to 49°F. Normal precipitation for the month is 3.44 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 Jersey County, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
79°F
Average low
55°F
Precipitation
3.44 in
Record high
102°FSep 1, 2011
Record low
33°FSep 29, 2003
Chance of a freeze
4%
Days of 90°F or more
3.7
Daylight
13 h 02 min to 11 h 48 min
Cloud cover
46%
Humidity
68%
Dew point
56°F
Wind
6.9 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 183°F60°F102°F 201148°F 200923%0%
Sep 283°F60°F101°F 202645°F 201723%0%
Sep 383°F59°F100°F 201149°F 200923%0%
Sep 483°F59°F100°F 202650°F 199723%0%
Sep 582°F59°F101°F 202647°F 199723%0%
Sep 682°F58°F97°F 199847°F 201723%0%
Sep 782°F58°F94°F 200245°F 201723%0%
Sep 882°F58°F94°F 202642°F 202423%0%
Sep 981°F57°F98°F 201345°F 202423%0%
Sep 1081°F57°F98°F 201348°F 199923%0%
Sep 1181°F57°F95°F 201347°F 199723%0%
Sep 1281°F56°F96°F 200047°F 199723%0%
Sep 1380°F56°F96°F 202543°F 201423%0%
Sep 1480°F55°F97°F 202543°F 201423%0%
Sep 1580°F55°F98°F 202643°F 201123%0%
Sep 1679°F55°F95°F 202643°F 200023%0%
Sep 1779°F54°F99°F 202643°F 199923%0%
Sep 1879°F54°F94°F 201845°F 201223%0%
Sep 1978°F53°F94°F 200040°F 201223%0%
Sep 2078°F53°F98°F 202238°F 200623%0%
Sep 2178°F53°F95°F 202240°F 200023%0%
Sep 2277°F52°F96°F 201736°F 199923%0%
Sep 2377°F52°F94°F 200736°F 201224%0%
Sep 2477°F51°F93°F 201737°F 201224%0%
Sep 2576°F51°F93°F 201737°F 201124%0%
Sep 2676°F51°F92°F 201735°F 200024%0%
Sep 2776°F50°F93°F 202138°F 200124%0%
Sep 2875°F50°F92°F 202141°F 200324%0%
Sep 2975°F49°F90°F 202533°F 200324%0%
Sep 3074°F49°F91°F 202535°F 199924%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Jersey County, 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 6:30 AM, sunset 7:32 PM
September 30
sunrise 6:57 AM, sunset 6:45 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00114489 (Jerseyville 2 Sw), public domain. Records: NOAA GHCN-Daily, station USW00053904, 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.