Jefferson County, IL Weather Forecast
County weather hub
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.
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 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
Daily Outlook
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 sourceExtended Forecast
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
Forecast coverage currently spans 1 of 1 mapped cities in Jefferson County.
Largest mapped city population in this region: 14,511.
