Jersey County climate

Jersey County Weather in December

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

Average highs run from 46°F on December 1 to 37°F on December 31, and lows from 28°F to 21°F. Normal precipitation for the month is 2.65 in over about 8 wet days.

December 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.-20020406080151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

December at a glance

Average high
41°F
Average low
24°F
Precipitation
2.65 in
Snowfall
2.2 in
Record high
77°FDec 28, 2025
Record low
-6°FDec 23, 2022
Chance of a freeze
100%
Daylight
9 h 37 min to 9 h 29 min
Cloud cover
66%
Humidity
83%
Dew point
28°F
Wind
9.2 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
Dec 146°F28°F69°F 201216°F 200227%3%
Dec 246°F28°F73°F 201214°F 202527%3%
Dec 345°F27°F75°F 201211°F 202527%4%
Dec 445°F27°F71°F 200110°F 202527%4%
Dec 545°F27°F72°F 19988°F 202527%4%
Dec 644°F27°F72°F 199810°F 200527%4%
Dec 744°F26°F67°F 20238°F 200527%4%
Dec 844°F26°F63°F 20247°F 200627%4%
Dec 943°F26°F68°F 20214°F 200527%4%
Dec 1043°F26°F67°F 201511°F 200927%4%
Dec 1143°F25°F64°F 202110°F 200027%4%
Dec 1242°F25°F70°F 20155°F 201327%4%
Dec 1342°F25°F65°F 20155°F 201027%5%
Dec 1442°F25°F66°F 20214°F 201027%5%
Dec 1541°F24°F74°F 20217°F 200026%5%
Dec 1641°F24°F71°F 20216°F 200026%5%
Dec 1741°F24°F63°F 20022°F 200026%5%
Dec 1840°F24°F62°F 20022°F 201626%5%
Dec 1940°F23°F61°F 19970°F 200026%5%
Dec 2040°F23°F65°F 2013-3°F 200026%5%
Dec 2140°F23°F63°F 20154°F 200826%5%
Dec 2239°F23°F60°F 2007-5°F 202226%6%
Dec 2339°F23°F65°F 2020-6°F 202226%6%
Dec 2439°F22°F74°F 20212°F 200026%6%
Dec 2539°F22°F65°F 20218°F 202226%6%
Dec 2638°F22°F66°F 20165°F 200226%6%
Dec 2738°F22°F67°F 20081°F 201726%6%
Dec 2838°F21°F77°F 2025-2°F 200026%6%
Dec 2938°F21°F67°F 202212°F 201726%6%
Dec 3037°F21°F67°F 20026°F 199826%6%
Dec 3137°F21°F69°F 20042°F 199826%6%

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.01020301102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CST).

December 1
sunrise 7:02 AM, sunset 4:39 PM
December 31
sunrise 7:20 AM, sunset 4:49 PM

Every day of December: 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.