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Troy, Illinois Weather Forecast
Troy, Illinois Weather
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Weather Forecast for Troy, Illinois : Madison County
Issued: 9:46 pm CST Jan 1, 2026 Latitude: 38.7292147 Longitude: -89.8831541 View on Google Maps

MouseOver for Detail Forecast
Tonight Friday Saturday Sunday Monday Tuesday Wednesday Thursday
Patchy Fog on Tonight Cloudy on Friday Mostly Cloudy on Saturday Mostly Sunny on Sunday Mostly Sunny on Monday Partly Sunny on Tuesday Partly Sunny on Wednesday 30% chance of rain on Thursday
Low: 28°F High: 35°F High: 40°F High: 42°F High: 58°F High: 62°F High: 56°F High: 59°F
Low: 27°F Low: 24°F Low: 33°F Low: 43°F Low: 38°F Low: 41°F  
Patchy Fog Cloudy Mostly Cloudy Mostly Sunny Mostly Sunny Partly Sunny Partly Sunny Rain
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Current Conditions at
SCOTT AFB - (KBLV)
34°
Cloudy
Mist
as of 9:35 PM CST
Rel. Humidity: 93%
Dew Point: 32°F
Visibility: 3 Miles
Pressure: 29.89 in.
Flight Rule: LIFR
Wind Data
Calm
Cloud Level(s): Solid Overcast at 300ft
Current Conditions at
ALTON - (KALN)
34°
Cloudy
Mist
as of 8:50 PM CST
Rel. Humidity: 86%
Dew Point: 30°F
Visibility: 5 Miles
Pressure: 29.91 in.
Flight Rule: IFR
Wind Data
3 MPH
Cloud Level(s): Solid Overcast at 600ft
Current Conditions at
EAST ST LOUIS - (KCPS)
34°
Cloudy
Mist
as of 8:53 PM CST
Rel. Humidity: 93%
Dew Point: 32°F
Visibility: 5 Miles
Pressure: 29.90 in.
Flight Rule: IFR
Wind Data
Calm
Cloud Level(s): Solid Overcast at 600ft
Current Conditions at
ST LOUIS - (KSTL)
34°
Cloudy
Mist
as of 8:51 PM CST
Rel. Humidity: 93%
Dew Point: 32°F
Visibility: 5 Miles
Pressure: 29.90 in.
Flight Rule: IFR
Wind Data
Calm
Cloud Level(s): Solid Overcast at 600ft
Patchy Fog on Tonight Tonight... Patchy fog before 11pm. Otherwise, cloudy, with a low around 28. Calm wind becoming north around 5 mph after midnight.
Cloudy on Friday Friday... Cloudy, with a high near 35. Northeast wind 5 to 7 mph.
Cloudy on Friday Night Friday Night... Cloudy, with a low around 27. Northeast wind around 6 mph.
Mostly Cloudy on Saturday Saturday... Mostly cloudy, then gradually becoming sunny, with a high near 40. Northeast wind around 6 mph.
Mostly Clear on Saturday Night Saturday Night... Mostly clear, with a low around 24. Light north wind.
Mostly Sunny on Sunday Sunday... Mostly sunny, with a high near 42.
Cloudy on Sunday Night Sunday Night... Partly cloudy, with a low around 33.
Mostly Sunny on Monday Monday... Mostly sunny, with a high near 58.
Mostly Cloudy on Monday Night Monday Night... Mostly cloudy, with a low around 43.
Partly Sunny on Tuesday Tuesday... Partly sunny, with a high near 62.
Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 38.
Partly Sunny on Wednesday Wednesday... Partly sunny, with a high near 56.
20% chance of rain Wednesday Night Wednesday Night... A 20 percent chance of rain. Mostly cloudy, with a low around 41.
30% chance of rain Thursday Thursday... A 30 percent chance of rain. Mostly cloudy, with a high near 59.
Current Radar Image


Sun Almanac for Troy, Illinois
Sunrise: 07:18 AM
Sunset: 4:49 PM
Civil Sunrise:06:48 AM
Civil Sunset: 5:18 PM
Nautical Sunrise: 06:15 AM
Nautical Sunset: 5:52 PM
Astro Sunrise: 05:42 AM
Astro Sunset: 6:24 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.