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Fairmont, Illinois Weather Forecast
Fairmont, Illinois Weather
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No Watches or Warnings for Fairmont
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Weather Forecast for Fairmont, Illinois : Madison County
Issued: 10:46 am CST Nov 14, 2025 Latitude: 38.9089371 Longitude: -90.2142773 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Saturday Sunday Monday Tuesday Wednesday Thursday
Sunny on This Afternoon Increasing Clouds on Tonight Mostly Sunny on Saturday Sunny on Sunday 30% chance of rain on Monday 20% chance of rain on Tuesday 30% chance of rain on Wednesday 70% chance of rain on Thursday
High: 77°F Low: 60°F High: 79°F High: 60°F High: 58°F High: 55°F High: 54°F High: 57°F
Low: 44°F Low: 39°F Low: 44°F Low: 37°F Low: 42°F  
Sunny Increasing Clouds Mostly Sunny Sunny Rain Rain Rain Rain
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Current Conditions at
ALTON - (KALN)
77°
Clear
as of 12:50 PM CST
Rel. Humidity: 50%
Dew Point: 57°F
Visibility: 10 Miles
Pressure: 29.97 in.
Flight Rule: VFR
Wind Data
9 MPH
210° Southwest
Cloud Level(s): Clear
Current Conditions at
ST CHARLES - (KSET)
79°
Clear
as of 12:54 PM CST
Rel. Humidity: 47%
Dew Point: 57°F
Visibility: 10 Miles
Pressure: 29.94 in.
Flight Rule: VFR
Wind Data
13 MPH
220° Southwest
Cloud Level(s): Clear
Current Conditions at
ST LOUIS - (KSTL)
79°
Mostly Clear
as of 12:51 PM CST
Rel. Humidity: 47%
Dew Point: 57°F
Visibility: 10 Miles
Pressure: 29.97 in.
Flight Rule: VFR
Wind Data
12 MPH
210° Southwest
Cloud Level(s): Few at 4000ft
Current Conditions at
EAST ST LOUIS - (KCPS)
79°
Clear
as of 12:53 PM CST
Rel. Humidity: 47%
Dew Point: 57°F
Visibility: 10 Miles
Pressure: 29.96 in.
Flight Rule: VFR
Wind Data
5 MPH
Gust: 17 MPH
Cloud Level(s): Clear
Sunny on This Afternoon This Afternoon... Sunny, with a high near 77. South wind 8 to 11 mph.
Increasing Clouds on Tonight Tonight... Increasing clouds, with a low around 60. South wind around 9 mph.
Mostly Sunny on Saturday Saturday... Mostly sunny, with a high near 79. South wind 8 to 15 mph becoming west in the afternoon. Winds could gust as high as 23 mph.
Mostly Clear on Saturday Night Saturday Night... Mostly clear, with a low around 44. North wind 7 to 9 mph.
Sunny on Sunday Sunday... Sunny, with a high near 60. Northwest wind 5 to 7 mph.
Mostly Clear on Sunday Night Sunday Night... Mostly clear, with a low around 39.
30% chance of rain Monday Monday... A 30 percent chance of rain after noon. Mostly sunny, with a high near 58.
70% chance of rain Monday Night Monday Night... Rain likely, mainly before midnight. Mostly cloudy, with a low around 44. Chance of precipitation is 70%.
20% chance of rain Tuesday Tuesday... A 20 percent chance of rain before noon. Partly sunny, with a high near 55.
20% chance of rain Tuesday Night Tuesday Night... A 20 percent chance of rain after midnight. Mostly cloudy, with a low around 37.
30% chance of rain Wednesday Wednesday... A 30 percent chance of rain. Partly sunny, with a high near 54.
60% chance of rain Wednesday Night Wednesday Night... Rain likely. Mostly cloudy, with a low around 42. Chance of precipitation is 60%.
70% chance of rain Thursday Thursday... Rain likely. Mostly cloudy, with a high near 57. Chance of precipitation is 70%.
Current Radar Image


Sun Almanac for Fairmont, Illinois
Sunrise: 06:43 AM
Sunset: 4:48 PM
Civil Sunrise:06:15 AM
Civil Sunset: 5:16 PM
Nautical Sunrise: 05:42 AM
Nautical Sunset: 5:48 PM
Astro Sunrise: 05:11 AM
Astro Sunset: 6:20 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.