Jefferson County, IL Weather Forecast

County weather hub

82°
F

Chance Showers And Thunderstorms

Compare major city weather across Jefferson County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.

Wednesday, April 15, 2026
Wind: 13 to 17 mph SSW
Wednesday

A chance of showers and thunderstorms. Mostly cloudy, with a high near 82. South southwest wind 13 to 17 mph, with gusts as high as 24 mph.

County weather hub

County Weather Overview

This county weather page brings together forecast coverage for Jefferson County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.

Current forecast coverage spans 1 of 1 mapped cities in Jefferson County.

Page Snapshot

Page focus
county weather
Forecast window
Apr 15, 2026
Latest sync
Apr 9, 2026 6:50 PM CDT
Forecast office
PAH
Source
NOAA / NWS
Next High
82°F
Wednesday
Next Low
60°F
Wednesday Night
Rain Outlook
2
Periods mentioning precipitation
Windiest
13 to 17 mph
Wednesday

Daily Outlook

Today
Apr 15
Chance Showers And Thunderstorms
82 °F
/ 60°F
Wind 13 to 17 mph

This Week in Jefferson County

Wednesday looks like the warmest upcoming period in Jefferson County at 82 degrees F.

Wednesday Night is the coolest period ahead with temperatures near 60 degrees F.

The strongest winds are forecast for Wednesday at about 13 to 17 mph SSW.

Precipitation is mentioned in 2 upcoming forecast periods.

Forecast Details

Last updated
Apr 9, 2026 6:50 PM CDT
Coverage
1 day
Time zone
America/Chicago
Forecast office
PAH
Radar station
KVWX

Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.

Open NOAA source

Extended Forecast

Wednesday Night
Apr 15
60°F
Chance Showers And Thunderstorms
7 to 12 mph SW

A chance of showers and thunderstorms. Mostly cloudy, with a low around 60. Southwest wind 7 to 12 mph, with gusts as high as 20 mph.

Detailed Forecast

Period Conditions Temp Wind
Wednesday
Apr 15
Chance Showers And Thunderstorms
82°F
13 to 17 mph
SSW
Wednesday Night
Apr 15
Chance Showers And Thunderstorms
60°F
7 to 12 mph
SW

Major City Forecasts

Live forecast snapshots for major cities across Jefferson County.

Coverage

Tracked cities
1
Coverage
100%

Forecast coverage currently spans 1 of 1 mapped cities in Jefferson County.

Largest mapped city population in this region: 14,511.

Jefferson County Courthouse in Mount Vernon
Jefferson County Courthouse in Mount Vernon image
Weather data provided by the National Weather Service (NOAA). Forecast pages update automatically as new periods are synced for each supported U.S. location.