Clinton County, IL Weather Forecast
County weather hub
Sunny
Compare major city weather across Clinton County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Sunny, with a high near 95. Heat index values as high as 100. Southwest wind around 10 mph.
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
- Oct 13 to Oct 19, 2026
- Latest sync
- Oct 13, 2026 12:31 PM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Clinton County
Today looks like the warmest upcoming period in Clinton County at 95 degrees F.
Saturday Night is the coolest period ahead with temperatures near 38 degrees F.
The strongest winds are forecast for Friday at about 18 to 24 mph NW.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 13, 2026 12:31 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 slight chance of showers and thunderstorms after 3am. Partly cloudy, with a low around 72. Southwest wind 3 to 7 mph. Chance of precipitation is 20%.
A chance of showers and thunderstorms before 7am, then showers and thunderstorms between 7am and 3pm, then a chance of showers and thunderstorms between 3pm and 4pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 83. West wind around 5 mph. Chance of precipitation is 90%.
Showers and thunderstorms likely. Mostly cloudy, with a low around 66. Northeast wind around 1 mph. Chance of precipitation is 70%.
Showers and thunderstorms. Partly sunny, with a high near 84. South wind 2 to 8 mph. Chance of precipitation is 80%.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 52. Chance of precipitation is 50%.
A slight chance of rain showers before 7am. Mostly sunny, with a high near 64. Chance of precipitation is 20%.
Mostly clear, with a low around 39.
Sunny, with a high near 63.
Clear, with a low around 38.
Sunny, with a high near 71.
Partly cloudy, with a low around 46.
Mostly sunny, with a high near 75.
Partly cloudy, with a low around 51.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Today
Oct 13
|
Sunny
|
95°F |
10 mph
SW
|
|
Tonight
Oct 13
|
Partly Cloudy then Slight Chance Showers And Thunderstorms
|
72°F |
3 to 7 mph
SW
|
|
Wednesday
Oct 14
|
Chance Showers And Thunderstorms then Showers And Thunderstorms
|
83°F |
5 mph
W
|
|
Wednesday Night
Oct 14
|
Showers And Thunderstorms Likely
|
66°F |
1 mph
NE
|
|
Thursday
Oct 15
|
Showers And Thunderstorms
|
84°F |
2 to 8 mph
S
|
|
Thursday Night
Oct 15
|
Chance Showers And Thunderstorms
|
52°F |
6 to 17 mph
W
|
|
Friday
Oct 16
|
Slight Chance Rain Showers then Mostly Sunny
|
64°F |
18 to 24 mph
NW
|
|
Friday Night
Oct 16
|
Mostly Clear
|
39°F |
5 to 18 mph
N
|
|
Saturday
Oct 17
|
Sunny
|
63°F |
2 to 6 mph
NE
|
|
Saturday Night
Oct 17
|
Clear
|
38°F |
2 mph
SE
|
|
Sunday
Oct 18
|
Sunny
|
71°F |
1 to 7 mph
SE
|
|
Sunday Night
Oct 18
|
Partly Cloudy
|
46°F |
2 to 6 mph
S
|
|
Monday
Oct 19
|
Mostly Sunny
|
75°F |
3 to 7 mph
S
|
|
Monday Night
Oct 19
|
Partly Cloudy
|
51°F |
1 to 5 mph
S
|
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.
