Clinton County, IL Weather Forecast
County weather hub
Mostly Cloudy then Chance 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.
A chance of showers and thunderstorms between 1pm and 4pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 80. East wind 2 to 6 mph. Chance of precipitation is 40%.
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
- May 26 to May 30, 2026
- Latest sync
- May 24, 2026 7:46 PM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Clinton County
Thursday looks like the warmest upcoming period in Clinton County at 83 degrees F.
Saturday Night is the coolest period ahead with temperatures near 62 degrees F.
The strongest winds are forecast for Saturday at about 6 to 10 mph E.
Precipitation is mentioned in 10 upcoming forecast periods.
Forecast Details
- Last updated
- May 24, 2026 7:46 PM CDT
- Coverage
- 5 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 before 10pm, then showers and thunderstorms likely. Mostly cloudy, with a low around 65. Chance of precipitation is 60%.
Showers and thunderstorms likely before 10am, then a chance of showers and thunderstorms between 10am and 1pm, then showers and thunderstorms likely. Partly sunny, with a high near 82. Chance of precipitation is 60%.
Showers and thunderstorms likely before 7pm, then a slight chance of showers and thunderstorms between 7pm and 1am. Partly cloudy, with a low around 66. Chance of precipitation is 60%.
A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 83. Chance of precipitation is 20%.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 67. Chance of precipitation is 30%.
A chance of rain showers before 7am, then a chance of showers and thunderstorms between 7am and 1pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 79. Chance of precipitation is 50%.
A chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Chance of precipitation is 50%.
A chance of rain showers before 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 76. Chance of precipitation is 40%.
A chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 62. Chance of precipitation is 40%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
May 26
|
Mostly Cloudy then Chance Showers And Thunderstorms
|
80°F |
2 to 6 mph
E
|
|
Tuesday Night
May 26
|
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
65°F |
1 to 6 mph
E
|
|
Wednesday
May 27
|
Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
|
82°F |
2 mph
SE
|
|
Wednesday Night
May 27
|
Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms
|
66°F |
2 mph
NE
|
|
Thursday
May 28
|
Mostly Sunny then Slight Chance Showers And Thunderstorms
|
83°F |
5 mph
E
|
|
Thursday Night
May 28
|
Chance Showers And Thunderstorms
|
67°F |
5 mph
E
|
|
Friday
May 29
|
Chance Showers And Thunderstorms
|
79°F |
6 mph
E
|
|
Friday Night
May 29
|
Chance Showers And Thunderstorms
|
64°F |
6 mph
E
|
|
Saturday
May 30
|
Chance Rain Showers
|
76°F |
6 to 10 mph
E
|
|
Saturday Night
May 30
|
Chance Showers And Thunderstorms then Partly Cloudy
|
62°F |
5 to 8 mph
E
|
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.
