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Fairmont, Illinois Weather Forecast
Fairmont, Illinois Weather
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Weather Forecast for Fairmont, Illinois : Madison County
Issued: 2:31 pm CST Dec 7, 2025 Latitude: 38.9089371 Longitude: -90.2142773 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Monday Tuesday Wednesday Thursday Friday Saturday Sunday
Cloudy on This Afternoon Mostly Cloudy on Tonight Mostly Sunny on Monday Mostly Sunny on Tuesday Partly Sunny on Wednesday 30% chance of snow on Thursday Partly Sunny on Friday Partly Sunny on Saturday Mostly Sunny on Sunday
High: 33°F Low: 20°F High: 34°F High: 51°F High: 47°F High: 35°F High: 26°F High: 20°F High: 26°F
Low: 25°F Low: 39°F Low: 26°F Low: 18°F Low: 6°F Low: 8°F  
Cloudy Mostly Cloudy Mostly Sunny Mostly Sunny Partly Sunny Snow Partly Sunny Partly Sunny Mostly Sunny
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Current Conditions at
ALTON - (KALN)
34°
Feels like 24°F
Cloudy
as of 2:50 PM CST
Rel. Humidity: 80%
Dew Point: 28°F
Visibility: 7 Miles
Pressure: 30.15 in.
Flight Rule: MVFR
Wind Data
13 MPH
010° North
Cloud Level(s): Solid Overcast at 1400ft
Current Conditions at
ST CHARLES - (KSET)
34°
Feels like 26°F
Cloudy
as of 2:54 PM CST
Rel. Humidity: 80%
Dew Point: 28°F
Visibility: 8 Miles
Pressure: 30.16 in.
Flight Rule: MVFR
Wind Data
9 MPH
010° North
Cloud Level(s): Solid Overcast at 1600ft
Current Conditions at
ST LOUIS - (KSTL)
34°
Feels like 24°F
Cloudy
Mist
as of 2:51 PM CST
Rel. Humidity: 86%
Dew Point: 30°F
Visibility: 6 Miles
Pressure: 30.15 in.
Flight Rule: IFR
Wind Data
13 MPH
0° North
Cloud Level(s): Solid Overcast at 900ft
Current Conditions at
EAST ST LOUIS - (KCPS)
36°
Feels like 26°F
Cloudy
Mist
as of 2:58 PM CST
Rel. Humidity: 80%
Dew Point: 30°F
Visibility: 5 Miles
Pressure: 30.14 in.
Flight Rule: IFR
Wind Data
14 MPH
010° North
Cloud Level(s): Broken at 800ft, Solid Overcast at 1200ft
Cloudy on This Afternoon This Afternoon... Cloudy, with a steady temperature around 33. North wind around 14 mph, with gusts as high as 22 mph.
Mostly Cloudy on Tonight Tonight... Mostly cloudy, with a low around 20. North wind 5 to 11 mph.
Mostly Sunny on Monday Monday... Mostly sunny, with a high near 34. North wind around 5 mph becoming calm in the morning.
Cloudy on Monday Night Monday Night... Partly cloudy, with a low around 25. South wind 5 to 9 mph.
Mostly Sunny on Tuesday Tuesday... Mostly sunny, with a high near 51. Southwest wind 9 to 11 mph, with gusts as high as 20 mph.
Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 39.
Partly Sunny on Wednesday Wednesday... Partly sunny, with a high near 47.
20% chance of snow Wednesday Night Wednesday Night... A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 26.
30% chance of snow Thursday Thursday... A 30 percent chance of snow, mainly before noon. Mostly cloudy, with a high near 35.
Mostly Cloudy on Thursday Night Thursday Night... Mostly cloudy, with a low around 18.
Partly Sunny on Friday Friday... Partly sunny, with a high near 26.
Mostly Cloudy on Friday Night Friday Night... Mostly cloudy, with a low around 6.
Partly Sunny on Saturday Saturday... Partly sunny and cold, with a high near 20.
Mostly Cloudy on Saturday Night Saturday Night... Mostly cloudy, with a low around 8.
Mostly Sunny on Sunday Sunday... Mostly sunny, with a high near 26.
Current Radar Image


Sun Almanac for Fairmont, Illinois
Sunrise: 07:06 AM
Sunset: 4:39 PM
Civil Sunrise:06:37 AM
Civil Sunset: 5:08 PM
Nautical Sunrise: 06:03 AM
Nautical Sunset: 5:42 PM
Astro Sunrise: 05:31 AM
Astro Sunset: 6:14 PM
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