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Fairmont, Illinois Weather Forecast
Fairmont, Illinois Weather
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Weather Forecast for Fairmont, Illinois : Madison County
Issued: 8:41 am CST Jan 24, 2026 Latitude: 38.9089371 Longitude: -90.2142773 View on Google Maps

MouseOver for Detail Forecast
Today Tonight Sunday Monday Tuesday Wednesday Thursday Friday
80% chance of snow on Today 100% chance of snow on Tonight 100% chance of snow on Sunday Sunny on Monday Sunny on Tuesday Mostly Sunny on Wednesday Mostly Sunny on Thursday Mostly Sunny on Friday
High: 12°F Low: 9 °F High: 17°F High: 16°F High: 33°F High: 26°F High: 22°F High: 22°F
Low: 0 °F Low: 5°F Low: 6°F Low: 7°F Low: 3°F  
Snow Snow Snow Sunny Sunny Mostly Sunny Mostly Sunny Mostly Sunny
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Current Conditions at
ALTON - (KALN)
Feels like -12°F
Cloudy
Light Snow
as of 10:04 AM CST
Rel. Humidity: 49%
Dew Point: -11°F
Visibility: 2 1/2 Miles
Pressure: 30.62 in.
Flight Rule: IFR
Wind Data
10 MPH
030° Northeast
Cloud Level(s): Scattered at 2100ft, Broken at 2900ft, Solid Overcast at 3700ft
Current Conditions at
ST CHARLES - (KSET)
Feels like -15°F
Cloudy
Light Snow
as of 9:54 AM CST
Rel. Humidity: 64%
Dew Point: -8°F
Visibility: 1 3/4 Miles
Pressure: 30.64 in.
Flight Rule: IFR
Wind Data
12 MPH
040° Northeast
Cloud Level(s): Broken at 2900ft, Solid Overcast at 3600ft
Current Conditions at
ST LOUIS - (KSTL)
Feels like -14°F
Cloudy
Light Snow
as of 10:04 AM CST
Rel. Humidity: 70%
Dew Point: -6°F
Visibility: 1 Miles
Pressure: 30.61 in.
Flight Rule: IFR
Wind Data
10 MPH
050° Northeast
Cloud Level(s): Solid Overcast at 2100ft
Current Conditions at
EAST ST LOUIS - (KCPS)
Feels like -11°F
Clear
Light Snow
as of 10:03 AM CST
Rel. Humidity: 77%
Dew Point: -2°F
Visibility: 3/4 Miles
Pressure: 30.62 in.
Flight Rule: MVFR
Wind Data
9 MPH
040° Northeast
80% chance of snow Today Today... Snow, mainly after noon. High near 12. Northeast wind around 10 mph. Chance of precipitation is 80%. Total daytime snow accumulation of 1 to 2 inches possible.

100% chance of snow Tonight Tonight... Snow. Low around 9. Northeast wind 7 to 10 mph. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.

100% chance of snow Sunday Sunday... Snow, mainly before 3pm. High near 17. North wind 10 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.

Mostly Clear on Sunday Night Sunday Night... Mostly cloudy, then gradually becoming mostly clear, with a low around 0. Wind chill values as low as -15. Northwest wind 9 to 11 mph, with gusts as high as 20 mph.

Sunny on Monday Monday... Sunny and cold, with a high near 16. West wind 7 to 11 mph.

Mostly Clear on Monday Night Monday Night... Mostly clear, with a low around 5.

Sunny on Tuesday Tuesday... Sunny, with a high near 33.

Cloudy on Tuesday Night Tuesday Night... Partly cloudy, with a low around 6.

Mostly Sunny on Wednesday Wednesday... Mostly sunny, with a high near 26.

Cloudy on Wednesday Night Wednesday Night... Partly cloudy, with a low around 7.

Mostly Sunny on Thursday Thursday... Mostly sunny, with a high near 22.

Cloudy on Thursday Night Thursday Night... Partly cloudy, with a low around 3.

Mostly Sunny on Friday Friday... Mostly sunny, with a high near 22.

Current Radar Image


Sun Almanac for Fairmont, Illinois
Sunrise: 07:13 AM
Sunset: 5:13 PM
Civil Sunrise:06:44 AM
Civil Sunset: 5:42 PM
Nautical Sunrise: 06:12 AM
Nautical Sunset: 6:14 PM
Astro Sunrise: 05:41 AM
Astro Sunset: 6:45 PM
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