Clark County, IL Weather Forecast
County weather hub
Sunny
Compare major city weather across Clark County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Sunny, with a high near 90. East northeast wind around 7 mph.
County Weather Overview
This county weather page brings together forecast coverage for Clark County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 2 of 2 mapped cities in Clark County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Jul 14 to Jul 20, 2026
- Latest sync
- Jul 14, 2026 10:31 AM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Clark County
Wednesday looks like the warmest upcoming period in Clark County at 91 degrees F.
Monday Night is the coolest period ahead with temperatures near 67 degrees F.
The strongest winds are forecast for Sunday at about 9 to 14 mph WNW.
Precipitation is mentioned in 10 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 14, 2026 10:31 AM CDT
- Coverage
- 7 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
Clear, with a low around 69. North northeast wind 1 to 6 mph.
Sunny, with a high near 91. East northeast wind around 3 mph.
Clear, with a low around 72. South wind around 3 mph.
A chance of showers and thunderstorms between 1pm and 4pm, then a chance of showers and thunderstorms. Sunny, with a high near 91. Southwest wind 2 to 6 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
A chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 73. Southwest wind 2 to 6 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Showers and thunderstorms likely after 7am. Mostly sunny, with a high near 90. West southwest wind 3 to 8 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Showers and thunderstorms likely before 1am. Partly cloudy, with a low around 72. Chance of precipitation is 70%.
A chance of showers and thunderstorms between 7am and 1pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 90. Chance of precipitation is 40%.
A chance of showers and thunderstorms. Mostly clear, with a low around 73.
A slight chance of showers and thunderstorms before 7am, then a chance of showers and thunderstorms. Mostly sunny, with a high near 88.
A chance of showers and thunderstorms before 7pm, then a slight chance of showers and thunderstorms between 7pm and 1am. Partly cloudy, with a low around 69.
A slight chance of showers and thunderstorms after 1pm. Sunny, with a high near 87.
A slight chance of showers and thunderstorms. Mostly clear, with a low around 67.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Today
Jul 14
|
Sunny
|
90°F |
7 mph
ENE
|
|
Tonight
Jul 14
|
Clear
|
69°F |
1 to 6 mph
NNE
|
|
Wednesday
Jul 15
|
Sunny
|
91°F |
3 mph
ENE
|
|
Wednesday Night
Jul 15
|
Clear
|
72°F |
3 mph
S
|
|
Thursday
Jul 16
|
Sunny then Chance Showers And Thunderstorms
|
91°F |
2 to 6 mph
SW
|
|
Thursday Night
Jul 16
|
Chance Showers And Thunderstorms then Mostly Clear
|
73°F |
2 to 6 mph
SW
|
|
Friday
Jul 17
|
Showers And Thunderstorms Likely
|
90°F |
3 to 8 mph
WSW
|
|
Friday Night
Jul 17
|
Showers And Thunderstorms Likely
|
72°F |
3 to 7 mph
WSW
|
|
Saturday
Jul 18
|
Chance Showers And Thunderstorms
|
90°F |
5 to 12 mph
WSW
|
|
Saturday Night
Jul 18
|
Chance Showers And Thunderstorms
|
73°F |
6 to 10 mph
WSW
|
|
Sunday
Jul 19
|
Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms
|
88°F |
9 to 14 mph
WNW
|
|
Sunday Night
Jul 19
|
Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms
|
69°F |
8 to 13 mph
WNW
|
|
Monday
Jul 20
|
Sunny then Slight Chance Showers And Thunderstorms
|
87°F |
8 to 13 mph
WNW
|
|
Monday Night
Jul 20
|
Slight Chance Showers And Thunderstorms
|
67°F |
6 to 12 mph
NNW
|
Major City Forecasts
Live forecast snapshots for major cities across Clark County.
Coverage
Forecast coverage currently spans 2 of 2 mapped cities in Clark County.
Largest mapped city population in this region: 3,774.
