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Fairmont, Illinois Weather Forecast
Fairmont, Illinois Weather
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Weather Forecast for Fairmont, Illinois : Madison County
Issued: 3:16 pm CST Nov 24, 2025 Latitude: 38.9089371 Longitude: -90.2142773 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Tuesday Wednesday Thanksgiving Day Friday Saturday Sunday Monday
60% chance of rain on This Afternoon 100% chance of rain on Tonight 20% chance of rain on Tuesday Mostly Sunny on Wednesday Sunny on Thanksgiving Day Partly Sunny on Friday 70% chance of rain & snow on Saturday 50% chance of rain on Sunday 40% chance of rain on Monday
High: 52°F Low: 50°F High: 58°F High: 46°F High: 41°F High: 39°F High: 41°F High: 44°F High: 46°F
Low: 35°F Low: 27°F Low: 22°F Low: 31°F Low: 32°F Low: 32°F  
Rain Rain Rain Mostly Sunny Sunny Partly Sunny Rain & Snow Rain Rain
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Current Conditions at
ST LOUIS - (KSTL)
54°
Cloudy
as of 3:18 PM CST
Rel. Humidity: 76%
Dew Point: 46°F
Visibility: 10 Miles
Pressure: 29.95 in.
Flight Rule: MVFR
Wind Data
10 MPH
110° East
Cloud Level(s): Few at 1500ft, Broken at 2900ft, Solid Overcast at 6000ft
Current Conditions at
EAST ST LOUIS - (KCPS)
52°
Cloudy
Light Rain
as of 3:36 PM CST
Rel. Humidity: 81%
Dew Point: 46°F
Visibility: 9 Miles
Pressure: 29.96 in.
Flight Rule: MVFR
Wind Data
8 MPH
140° Southeast
Cloud Level(s): Broken at 2800ft, Broken at 4800ft, Solid Overcast at 6000ft
60% chance of rain This Afternoon This Afternoon... Rain likely, mainly after 5pm. Cloudy, with a high near 52. Southeast wind around 8 mph. Chance of precipitation is 60%.

100% chance of rain Tonight Tonight... Rain, mainly before 3am. Patchy fog after 8pm. Low around 50. Southeast wind 3 to 8 mph. Chance of precipitation is 100%.

20% chance of rain Tuesday Tuesday... A 20 percent chance of rain after noon. Patchy fog before 11am. Otherwise, mostly cloudy, with a high near 58. Calm wind becoming west 5 to 9 mph in the morning.

Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 35. West wind 9 to 18 mph, with gusts as high as 29 mph.

Mostly Sunny on Wednesday Wednesday... Mostly sunny, with a high near 46. Breezy, with a west wind 13 to 20 mph, with gusts as high as 31 mph.

Cloudy on Wednesday Night Wednesday Night... Partly cloudy, with a low around 27.

Sunny on Thanksgiving Day Thanksgiving Day... Sunny, with a high near 41.

Mostly Clear on Thursday Night Thursday Night... Mostly clear, with a low around 22.

Partly Sunny on Friday Friday... Partly sunny, with a high near 39.

60% chance of snow Friday Night Friday Night... A chance of snow before midnight, then snow likely, possibly mixed with rain. Cloudy, with a low around 31. Chance of precipitation is 60%.

70% chance of rain & snow Saturday Saturday... Rain and snow likely. Cloudy, with a high near 41. Chance of precipitation is 70%.

50% chance of rain Saturday Night Saturday Night... A 50 percent chance of rain. Cloudy, with a low around 32.

50% chance of rain Sunday Sunday... A 50 percent chance of rain. Mostly cloudy, with a high near 44.

50% chance of rain Sunday Night Sunday Night... A 50 percent chance of rain. Cloudy, with a low around 32.

40% chance of rain Monday Monday... A 40 percent chance of rain. Mostly cloudy, with a high near 46.

Current Radar Image


Sun Almanac for Fairmont, Illinois
Sunrise: 06:54 AM
Sunset: 4:41 PM
Civil Sunrise:06:25 AM
Civil Sunset: 5:11 PM
Nautical Sunrise: 05:52 AM
Nautical Sunset: 5:43 PM
Astro Sunrise: 05:20 AM
Astro Sunset: 6:15 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.