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Clark, Illinois Weather Forecast
Clark, Illinois Weather
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Weather Forecast for Clark, Illinois : Greene County
Issued: 12:41 am CST Nov 5, 2025 Latitude: 39.2597697 Longitude: -90.5778994 View on Google Maps

MouseOver for Detail Forecast
Overnight Wednesday Thursday Friday Saturday Sunday Monday Veterans Day
Cloudy on Overnight Sunny on Wednesday Sunny on Thursday 20% chance of rain on Friday 20% chance of rain on Saturday Mostly Sunny on Sunday Sunny on Monday Mostly Sunny on Veterans Day
Low: 52°F High: 68°F High: 64°F High: 71°F High: 64°F High: 44°F High: 43°F High: 55°F
Low: 35°F Low: 54°F Low: 40°F Low: 33°F Low: 23°F Low: 26°F  
Cloudy Sunny Sunny Rain Rain Mostly Sunny Sunny Mostly Sunny
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Current Conditions at
ST CHARLES - (KSET)
54°
Clear
as of 11:54 PM CST
Rel. Humidity: 76%
Dew Point: 46°F
Visibility: 10 Miles
Pressure: 30.01 in.
Flight Rule: VFR
Wind Data
3 MPH
170° South
Cloud Level(s): Clear
Current Conditions at
PITTSFIELD - (KPPQ)
63°
Clear
as of 12:35 AM CST
Rel. Humidity: 45%
Dew Point: 41°F
Visibility: 10 Miles
Pressure: 29.95 in.
Flight Rule: VFR
Wind Data
16 MPH
Gust: 21 MPH
210° Southwest
Cloud Level(s): Clear
Current Conditions at
ST LOUIS - (KSTL)
61°
Partly Cloudy
as of 11:51 PM CST
Rel. Humidity: 59%
Dew Point: 46°F
Visibility: 10 Miles
Pressure: 30.02 in.
Flight Rule: VFR
Wind Data
10 MPH
210° Southwest
Cloud Level(s): Scattered at 25000ft
Current Conditions at
ALTON - (KALN)
57°
Clear
as of 12:35 AM CST
Rel. Humidity: 71%
Dew Point: 48°F
Visibility: 10 Miles
Pressure: 30.02 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Cloudy on Overnight Overnight... Partly cloudy, with a low around 52. Southwest wind 7 to 9 mph, with gusts as high as 20 mph.

Sunny on Wednesday Wednesday... Sunny, with a high near 68. Southwest wind 7 to 15 mph becoming north in the afternoon. Winds could gust as high as 24 mph.

Clear on Wednesday Night Wednesday Night... Clear, with a low around 35. North wind around 6 mph becoming light and variable in the evening.

Sunny on Thursday Thursday... Sunny, with a high near 64. Light east wind becoming southeast 8 to 13 mph in the morning. Winds could gust as high as 23 mph.

40% chance of rain Thursday Night Thursday Night... A 40 percent chance of rain after midnight. Mostly cloudy, with a low around 54. Southeast wind around 9 mph becoming southwest after midnight. Winds could gust as high as 20 mph.

20% chance of rain Friday Friday... A 20 percent chance of rain before noon. Mostly sunny, with a high near 71.

Mostly Clear on Friday Night Friday Night... Mostly clear, with a low around 40.

20% chance of rain Saturday Saturday... A 20 percent chance of rain after noon. Mostly sunny, with a high near 64.

20% chance of rain Saturday Night Saturday Night... A 20 percent chance of rain before midnight. Mostly cloudy, with a low around 33.

Mostly Sunny on Sunday Sunday... Mostly sunny, with a high near 44.

Mostly Clear on Sunday Night Sunday Night... Mostly clear, with a low around 23.

Sunny on Monday Monday... Sunny, with a high near 43.

Mostly Clear on Monday Night Monday Night... Mostly clear, with a low around 26.

Mostly Sunny on Veterans Day Veterans Day... Mostly sunny, with a high near 55.

Current Radar Image


Sun Almanac for Clark, Illinois
Sunrise: 06:35 AM
Sunset: 4:57 PM
Civil Sunrise:06:07 AM
Civil Sunset: 5:25 PM
Nautical Sunrise: 05:35 AM
Nautical Sunset: 5:57 PM
Astro Sunrise: 05:04 AM
Astro Sunset: 6:28 PM
Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the National Weather Service for official information.