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Fairmont, Illinois Weather Forecast
Fairmont, Illinois Weather
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Weather Forecast for Fairmont, Illinois : Madison County
Issued: 11:06 am CST Jan 1, 2026 Latitude: 38.9089371 Longitude: -90.2142773 View on Google Maps

MouseOver for Detail Forecast
New Year's Day Tonight Friday Saturday Sunday Monday Tuesday Wednesday
Cloudy on New Year's Day Mostly Cloudy on Tonight Cloudy on Friday Mostly Sunny on Saturday Mostly Sunny on Sunday Sunny on Monday Mostly Sunny on Tuesday Partly Sunny on Wednesday
High: 37°F Low: 28°F High: 40°F High: 41°F High: 43°F High: 59°F High: 61°F High: 56°F
  Low: 28°F Low: 24°F Low: 34°F Low: 40°F Low: 40°F  
Cloudy Mostly Cloudy Cloudy Mostly Sunny Mostly Sunny Sunny Mostly Sunny Partly Sunny
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Current Conditions at
ALTON - (KALN)
34°
Cloudy
as of 1:50 PM CST
Rel. Humidity: 80%
Dew Point: 28°F
Visibility: 10 Miles
Pressure: 29.96 in.
Flight Rule: MVFR
Wind Data
5 MPH
090° East
Cloud Level(s): Solid Overcast at 1000ft
Current Conditions at
ST CHARLES - (KSET)
Cloudy
as of 1:54 PM CST
Pressure: 29.94 in.
Wind Data
Calm
Current Conditions at
ST LOUIS - (KSTL)
34°
Cloudy
as of 1:51 PM CST
Rel. Humidity: 86%
Dew Point: 30°F
Visibility: 7 Miles
Pressure: 29.95 in.
Flight Rule: IFR
Wind Data
3 MPH
050° Northeast
Cloud Level(s): Solid Overcast at 800ft
Current Conditions at
EAST ST LOUIS - (KCPS)
36°
Cloudy
Mist
as of 1:53 PM CST
Rel. Humidity: 86%
Dew Point: 32°F
Visibility: 8 Miles
Pressure: 29.96 in.
Flight Rule: IFR
Wind Data
3 MPH
030° Northeast
Cloud Level(s): Solid Overcast at 800ft
Cloudy on New Year's Day New Year's Day... Cloudy, with a high near 37. Light northwest wind.
Mostly Cloudy on Tonight Tonight... Mostly cloudy, with a low around 28. Calm wind becoming north around 5 mph.
Cloudy on Friday Friday... Cloudy, with a high near 40. Northeast wind 3 to 7 mph.
Cloudy on Friday Night Friday Night... Cloudy, with a low around 28. Northeast wind around 6 mph.
Mostly Sunny on Saturday Saturday... Mostly sunny, with a high near 41. North wind around 6 mph.
Mostly Clear on Saturday Night Saturday Night... Mostly clear, with a low around 24.
Mostly Sunny on Sunday Sunday... Mostly sunny, with a high near 43.
Cloudy on Sunday Night Sunday Night... Partly cloudy, with a low around 34.
Sunny on Monday Monday... Sunny, with a high near 59.
Mostly Cloudy on Monday Night Monday Night... Mostly cloudy, with a low around 40.
Mostly Sunny on Tuesday Tuesday... Mostly sunny, with a high near 61.
Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 40.
Partly Sunny on Wednesday Wednesday... Partly sunny, with a high near 56.
Current Radar Image


Sun Almanac for Fairmont, Illinois
Sunrise: 07:20 AM
Sunset: 4:50 PM
Civil Sunrise:06:50 AM
Civil Sunset: 5:19 PM
Nautical Sunrise: 06:16 AM
Nautical Sunset: 5:53 PM
Astro Sunrise: 05:44 AM
Astro Sunset: 6:25 PM
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