Clark, IL Weather Forecast
Local 7-day forecast
Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Clark, IL in one place.
A chance of showers and thunderstorms before 8am, then a chance of showers and thunderstorms between 8am and 9am, then scattered showers and thunderstorms. Partly sunny, with a high near 91. East wind around 2 mph. Chance of precipitation is 60%.
Local Weather Overview
This forecast page for Clark, IL is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Sep 15, 2026 5:13 PM CDT.
The active forecast window currently covers Sep 16 to Sep 21, 2026 for Clark, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 16 to Sep 21, 2026
- Latest sync
- Sep 15, 2026 5:13 PM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Clark
Thursday looks like the warmest upcoming period in Clark at 95 degrees F.
Monday Night is the coolest period ahead with temperatures near 60 degrees F.
The strongest winds are forecast for Saturday at about 5 to 8 mph SW.
Precipitation is mentioned in 10 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 15, 2026 5:13 PM CDT
- Coverage
- 6 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
Isolated showers and thunderstorms before 11pm. Mostly clear, with a low around 73. South wind around 3 mph. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms between 7am and 1pm. Sunny, with a high near 95. West wind around 5 mph. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 71. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms before 7am. Sunny, with a high near 94. Chance of precipitation is 20%.
Mostly clear, with a low around 72.
Mostly sunny, with a high near 94.
A slight chance of showers and thunderstorms between 7pm and 1am, then a chance of showers and thunderstorms. Partly cloudy, with a low around 70. Chance of precipitation is 40%.
A chance of showers and thunderstorms. Mostly sunny, with a high near 88. Chance of precipitation is 40%.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Chance of precipitation is 40%.
A chance of rain showers. Mostly cloudy, with a high near 80. Chance of precipitation is 30%.
A slight chance of rain showers. Mostly cloudy, with a low around 60. Chance of precipitation is 20%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Sep 16
|
Chance Showers And Thunderstorms
|
91°F |
2 mph
E
|
|
Wednesday Night
Sep 16
|
Isolated Showers And Thunderstorms then Mostly Clear
|
73°F |
3 mph
S
|
|
Thursday
Sep 17
|
Slight Chance Showers And Thunderstorms
|
95°F |
5 mph
W
|
|
Thursday Night
Sep 17
|
Partly Cloudy then Slight Chance Showers And Thunderstorms
|
71°F |
2 mph
NE
|
|
Friday
Sep 18
|
Slight Chance Showers And Thunderstorms then Sunny
|
94°F |
5 mph
SE
|
|
Friday Night
Sep 18
|
Mostly Clear
|
72°F |
5 mph
S
|
|
Saturday
Sep 19
|
Mostly Sunny
|
94°F |
5 to 8 mph
SW
|
|
Saturday Night
Sep 19
|
Slight Chance Showers And Thunderstorms
|
70°F |
3 mph
SW
|
|
Sunday
Sep 20
|
Chance Showers And Thunderstorms
|
88°F |
2 to 7 mph
NW
|
|
Sunday Night
Sep 20
|
Chance Showers And Thunderstorms
|
64°F |
2 to 6 mph
N
|
|
Monday
Sep 21
|
Chance Rain Showers
|
80°F |
3 to 7 mph
NW
|
|
Monday Night
Sep 21
|
Slight Chance Rain Showers
|
60°F |
6 mph
N
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Clark.