Clinton County, IL Weather Forecast
County weather hub
Scattered Showers And Thunderstorms
Compare major city weather across Clinton County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Scattered showers and thunderstorms. Partly sunny, with a high near 88. Heat index values as high as 102. West wind around 5 mph. Chance of precipitation is 30%.
County Weather Overview
This county weather page brings together forecast coverage for Clinton County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 4 of 4 mapped cities in Clinton County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Jul 10 to Jul 16, 2026
- Latest sync
- Jul 9, 2026 8:31 PM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Clinton County
Wednesday looks like the warmest upcoming period in Clinton County at 90 degrees F.
Sunday Night is the coolest period ahead with temperatures near 68 degrees F.
The strongest winds are forecast for Sunday at about 2 to 7 mph NE.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 9, 2026 8:31 PM CDT
- Coverage
- 7 days
- Time zone
- America/Chicago
- Forecast office
- LSX
- Radar station
- KLSX
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 70. Northeast wind 0 to 3 mph. Chance of precipitation is 70%.
A chance of showers and thunderstorms. Partly sunny, with a high near 85. West wind around 3 mph. Chance of precipitation is 70%.
A chance of showers and thunderstorms before 1am, then a chance of showers and thunderstorms. Partly cloudy, with a low around 69. North wind 0 to 3 mph. Chance of precipitation is 50%.
A chance of showers and thunderstorms. Mostly sunny, with a high near 85. Chance of precipitation is 30%.
A chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 68. Chance of precipitation is 30%.
Sunny, with a high near 87.
Mostly clear, with a low around 69.
Sunny, with a high near 88.
Mostly clear, with a low around 70.
Sunny, with a high near 90.
Mostly clear, with a low around 71.
Sunny, with a high near 90.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Jul 10
|
Scattered Showers And Thunderstorms
|
88°F |
5 mph
W
|
|
Friday Night
Jul 10
|
Chance Showers And Thunderstorms
|
70°F |
0 to 3 mph
NE
|
|
Saturday
Jul 11
|
Chance Showers And Thunderstorms
|
85°F |
3 mph
W
|
|
Saturday Night
Jul 11
|
Chance Showers And Thunderstorms
|
69°F |
0 to 3 mph
N
|
|
Sunday
Jul 12
|
Chance Showers And Thunderstorms
|
85°F |
2 to 7 mph
NE
|
|
Sunday Night
Jul 12
|
Chance Showers And Thunderstorms then Mostly Clear
|
68°F |
1 to 7 mph
NE
|
|
Monday
Jul 13
|
Sunny
|
87°F |
2 to 7 mph
NE
|
|
Monday Night
Jul 13
|
Mostly Clear
|
69°F |
0 to 6 mph
NE
|
|
Tuesday
Jul 14
|
Sunny
|
88°F |
1 to 5 mph
E
|
|
Tuesday Night
Jul 14
|
Mostly Clear
|
70°F |
0 to 5 mph
NE
|
|
Wednesday
Jul 15
|
Sunny
|
90°F |
2 mph
SW
|
|
Wednesday Night
Jul 15
|
Mostly Clear
|
71°F |
2 mph
SE
|
|
Thursday
Jul 16
|
Sunny
|
90°F |
1 to 5 mph
SW
|
Major City Forecasts
Live forecast snapshots for major cities across Clinton County.
Coverage
Forecast coverage currently spans 4 of 4 mapped cities in Clinton County.
Largest mapped city population in this region: 4,538.
