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Troy, Illinois Weather Forecast
Troy, Illinois Weather
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Weather Forecast for Troy, Illinois : Madison County
Issued: 10:01 am CST Dec 7, 2025 Latitude: 38.7292147 Longitude: -89.8831541 View on Google Maps

MouseOver for Detail Forecast
Today Tonight Monday Tuesday Wednesday Thursday Friday Saturday
10% chance of  on Today 20% chance of snow on Tonight Mostly Cloudy on Monday Mostly Sunny on Tuesday Partly Sunny on Wednesday 30% chance of rain & snow on Thursday Mostly Sunny on Friday Partly Sunny on Saturday
High: 32 °F Low: 22°F High: 34°F High: 51°F High: 48°F High: 37°F High: 24°F High: 21°F
Low: 25°F Low: 41°F Low: 27°F Low: 17°F Low: 6°F  
Cloudy Snow Mostly Cloudy Mostly Sunny Partly Sunny Rain & Snow Mostly Sunny Partly Sunny
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Current Conditions at
SCOTT AFB - (KBLV)
45°
Feels like 39°F
Cloudy
as of 9:55 AM CST
Rel. Humidity: 81%
Dew Point: 39°F
Visibility: 7 Miles
Pressure: 30.02 in.
Flight Rule: MVFR
Wind Data
10 MPH
300° Northwest
Cloud Level(s): Solid Overcast at 1900ft
Current Conditions at
ALTON - (KALN)
41°
Feels like 35°F
Cloudy
as of 9:50 AM CST
Rel. Humidity: 75%
Dew Point: 34°F
Visibility: 7 Miles
Pressure: 30.04 in.
Flight Rule: VFR
Wind Data
9 MPH
320° Northwest
Cloud Level(s): Scattered at 2200ft, Solid Overcast at 4600ft
Current Conditions at
EAST ST LOUIS - (KCPS)
45°
Feels like 38°F
Cloudy
as of 9:53 AM CST
Rel. Humidity: 75%
Dew Point: 37°F
Visibility: 9 Miles
Pressure: 30.04 in.
Flight Rule: MVFR
Wind Data
12 MPH
310° Northwest
Cloud Level(s): Solid Overcast at 2200ft
Current Conditions at
ST LOUIS - (KSTL)
41°
Feels like 33°F
Cloudy
as of 9:51 AM CST
Rel. Humidity: 80%
Dew Point: 36°F
Visibility: 10 Miles
Pressure: 30.05 in.
Flight Rule: MVFR
Wind Data
13 MPH
310° Northwest
Cloud Level(s): Broken at 1800ft, Broken at 2300ft, Solid Overcast at 4400ft
10% chance of  Today Today... A slight chance of drizzle before 4pm, then a slight chance of drizzle after 5pm. Cloudy, with a temperature falling to around 32 by 5pm. West wind 7 to 14 mph becoming north in the afternoon. Winds could gust as high as 21 mph.

20% chance of snow Tonight Tonight... A 20 percent chance of snow before 11pm. Mostly cloudy, with a low around 22. North wind 6 to 13 mph.

Mostly Cloudy on Monday Monday... Mostly cloudy, then gradually becoming sunny, with a high near 34. North wind around 6 mph becoming calm in the morning.

Cloudy on Monday Night Monday Night... Partly cloudy, with a low around 25. Light southeast wind becoming south 5 to 10 mph in the evening.

Mostly Sunny on Tuesday Tuesday... Mostly sunny, with a high near 51. South wind 10 to 14 mph, with gusts as high as 21 mph.

Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 41.

Partly Sunny on Wednesday Wednesday... Partly sunny, with a high near 48.

20% chance of snow Wednesday Night Wednesday Night... A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 27.

30% chance of rain & snow Thursday Thursday... A chance of rain and snow. Mostly cloudy, with a high near 37. Chance of precipitation is 30%.

20% chance of snow Thursday Night Thursday Night... A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 17.

Mostly Sunny on Friday Friday... Mostly sunny, with a high near 24.

Mostly Cloudy on Friday Night Friday Night... Mostly cloudy, with a low around 6.

Partly Sunny on Saturday Saturday... Partly sunny, with a high near 21.

Current Radar Image


Sun Almanac for Troy, Illinois
Sunrise: 07:05 AM
Sunset: 4:38 PM
Civil Sunrise:06:35 AM
Civil Sunset: 5:07 PM
Nautical Sunrise: 06:02 AM
Nautical Sunset: 5:41 PM
Astro Sunrise: 05:30 AM
Astro Sunset: 6:13 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.