Clay County, IL Weather Forecast
County weather hub
Mostly Sunny then Chance Showers And Thunderstorms
Compare major city weather across Clay County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
A chance of showers and thunderstorms between 1pm and 4pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 84. South wind 2 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.
County Weather Overview
This county weather page brings together forecast coverage for Clay 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 Clay County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Apr 17 to Apr 21, 2026
- Latest sync
- Apr 15, 2026 4:14 PM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Clay County
Friday looks like the warmest upcoming period in Clay County at 84 degrees F.
Saturday Night is the coolest period ahead with temperatures near 39 degrees F.
The strongest winds are forecast for Saturday at about 14 to 17 mph W.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 15, 2026 4:14 PM CDT
- Coverage
- 5 days
- Time zone
- America/Chicago
- Forecast office
- ILX
- 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 before 1am, then showers and thunderstorms likely. Mostly cloudy, with a low around 56. South southwest wind around 13 mph, with gusts as high as 22 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Showers and thunderstorms likely. Partly sunny, with a high near 67. West wind 14 to 17 mph, with gusts as high as 24 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
A chance of rain showers before 1am. Partly cloudy, with a low around 39. Chance of precipitation is 40%.
Sunny, with a high near 61.
Clear, with a low around 39.
Sunny, with a high near 67.
Mostly clear, with a low around 49.
Sunny, with a high near 75.
Mostly clear, with a low around 53.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Apr 17
|
Mostly Sunny then Chance Showers And Thunderstorms
|
84°F |
2 to 14 mph
S
|
|
Friday Night
Apr 17
|
Chance Showers And Thunderstorms
|
56°F |
13 mph
SSW
|
|
Saturday
Apr 18
|
Showers And Thunderstorms Likely
|
67°F |
14 to 17 mph
W
|
|
Saturday Night
Apr 18
|
Chance Rain Showers
|
39°F |
7 to 13 mph
WNW
|
|
Sunday
Apr 19
|
Sunny
|
61°F |
7 to 14 mph
WNW
|
|
Sunday Night
Apr 19
|
Clear
|
39°F |
5 to 9 mph
NW
|
|
Monday
Apr 20
|
Sunny
|
67°F |
6 to 9 mph
S
|
|
Monday Night
Apr 20
|
Mostly Clear
|
49°F |
8 mph
S
|
|
Tuesday
Apr 21
|
Sunny
|
75°F |
8 to 15 mph
SW
|
|
Tuesday Night
Apr 21
|
Mostly Clear
|
53°F |
10 mph
SW
|
Major City Forecasts
Live forecast snapshots for major cities across Clay County.
Coverage
Forecast coverage currently spans 1 of 1 mapped cities in Clay County.
Largest mapped city population in this region: 4,831.