Fairmont, Illinois Weather
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Weather Forecast for Fairmont, Illinois : Madison County
Issued: 5:37 am CDT May 11, 2025 Latitude: 38.9089371 Longitude: -90.2142773 View on Google Maps

MouseOver for Detail Forecast
Today Tonight Monday Tuesday Wednesday Thursday Friday Saturday
Mostly Sunny on Today Increasing Clouds on Tonight 60% chance of thunderstorms on Monday 40% chance of thunderstorms on Tuesday Sunny on Wednesday 20% chance of thunderstorms on Thursday Mostly Sunny on Friday 20% chance of thunderstorms on Saturday
High: 80°F Low: 60°F High: 75°F High: 79°F High: 84°F High: 91°F High: 85°F High: 82°F
Low: 61°F Low: 62°F Low: 68°F Low: 65°F Low: 61°F  
Mostly Sunny Increasing Clouds Thunderstorms Thunderstorms Sunny Thunderstorms Mostly Sunny Thunderstorms
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Current Conditions at
ALTON - (KALN)
54°
Clear
as of 6:50 AM CDST
Rel. Humidity: 50%
Dew Point: 36°F
Visibility: 10 Miles
Pressure: 30.20 in.
Flight Rule: VFR
Wind Data
6 MPH
Cloud Level(s): Clear
Current Conditions at
ST CHARLES - (KSET)
57°
Clear
as of 6:54 AM CDST
Rel. Humidity: 44%
Dew Point: 36°F
Visibility: 10 Miles
Pressure: 30.19 in.
Flight Rule: VFR
Wind Data
7 MPH
060° Northeast
Cloud Level(s): Clear
Current Conditions at
ST LOUIS - (KSTL)
57°
Mostly Cloudy
as of 6:51 AM CDST
Rel. Humidity: 44%
Dew Point: 36°F
Visibility: 10 Miles
Pressure: 30.19 in.
Flight Rule: VFR
Wind Data
3 MPH
060° Northeast
Cloud Level(s): Few at 20000ft, Broken at 25000ft
Current Conditions at
EAST ST LOUIS - (KCPS)
55°
Clear
as of 6:53 AM CDST
Rel. Humidity: 66%
Dew Point: 45°F
Visibility: 10 Miles
Pressure: 30.18 in.
Flight Rule: VFR
Wind Data
5 MPH
010° North
Cloud Level(s): Clear
Mostly Sunny on Today Today... Mostly sunny, with a high near 80. Northeast wind 6 to 9 mph.
Increasing Clouds on Tonight Tonight... Increasing clouds, with a low around 60. Northeast wind 5 to 8 mph.
60% chance of thunderstorms Monday Monday... Showers and thunderstorms likely, mainly after 4pm. Mostly cloudy, with a high near 75. East wind 5 to 9 mph. Chance of precipitation is 60%.
60% chance of thunderstorms Monday Night Monday Night... Showers and thunderstorms likely, mainly before 7pm. Mostly cloudy, with a low around 61. East wind around 6 mph becoming calm in the evening. Chance of precipitation is 60%.
40% chance of thunderstorms Tuesday Tuesday... A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 79. Calm wind becoming southeast around 5 mph in the afternoon.
Mostly Clear on Tuesday Night Tuesday Night... Mostly clear, with a low around 62.
Sunny on Wednesday Wednesday... Sunny, with a high near 84.
Cloudy on Wednesday Night Wednesday Night... Partly cloudy, with a low around 68.
20% chance of thunderstorms Thursday Thursday... A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 91.
Cloudy on Thursday Night Thursday Night... Partly cloudy, with a low around 65.
Mostly Sunny on Friday Friday... Mostly sunny, with a high near 85.
30% chance of thunderstorms Friday Night Friday Night... A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 61.
20% chance of thunderstorms Saturday Saturday... A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 82.
Current Radar Image


Sun Almanac for Fairmont, Illinois
Sunrise: 05:51 AM
Sunset: 8:03 PM
Civil Sunrise:05:22 AM
Civil Sunset: 8:33 PM
Nautical Sunrise: 04:45 AM
Nautical Sunset: 9:09 PM
Astro Sunrise: 04:05 AM
Astro Sunset: 9:49 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.