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Troy, Illinois Weather Forecast
Troy, Illinois Weather
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Weather Forecast for Troy, Illinois : Madison County
Issued: 11:51 am CST Dec 1, 2025 Latitude: 38.7292147 Longitude: -89.8831541 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Tuesday Wednesday Thursday Friday Saturday Sunday
80% chance of snow on This Afternoon 100% chance of snow on Tonight Partly Sunny on Tuesday Partly Sunny on Wednesday Mostly Sunny on Thursday 30% chance of snow on Friday Partly Sunny on Saturday Mostly Cloudy on Sunday
High: 27°F Low: 18°F High: 27°F High: 39°F High: 23°F High: 34°F High: 39°F High: 36°F
Low: 19°F Low: 15°F Low: 12°F Low: 26°F Low: 25°F  
Snow Snow Partly Sunny Partly Sunny Mostly Sunny Snow Partly Sunny Mostly Cloudy
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Current Conditions at
ALTON - (KALN)
25°
Cloudy
Light Snow
as of 11:45 AM CST
Rel. Humidity: 85%
Dew Point: 21°F
Visibility: 2 Miles
Pressure: 30.29 in.
Flight Rule: IFR
Wind Data
5 MPH
170° South
Cloud Level(s): Solid Overcast at 1600ft
Current Conditions at
EAST ST LOUIS - (KCPS)
27°
Cloudy
Snow
as of 12:00 PM CST
Rel. Humidity: 79%
Dew Point: 21°F
Visibility: 2 1/2 Miles
Pressure: 30.31 in.
Flight Rule: IFR
Wind Data
3 MPH
190° South
Cloud Level(s): Solid Overcast at 1300ft
Current Conditions at
ST LOUIS - (KSTL)
25°
Clear
Heavy Snow Freezing Fog
as of 12:12 PM CST
Rel. Humidity: 85%
Dew Point: 21°F
Visibility: 1/4 Miles
Pressure: 30.28 in.
Flight Rule: IFR
Wind Data
5 MPH
190° South
80% chance of snow This Afternoon This Afternoon... Snow. High near 27. East wind around 5 mph becoming calm. Chance of precipitation is 80%. Total daytime snow accumulation of 1 to 2 inches possible.
100% chance of snow Tonight Tonight... Snow, mainly before midnight. Low around 18. Calm wind becoming northwest 5 to 8 mph in the evening. Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.
Partly Sunny on Tuesday Tuesday... Partly sunny, with a high near 27. Northwest wind 5 to 7 mph becoming light and variable in the afternoon.
Mostly Clear on Tuesday Night Tuesday Night... Mostly clear, with a low around 19. Calm wind becoming south around 6 mph in the evening.
Partly Sunny on Wednesday Wednesday... Partly sunny, with a high near 39. South wind 5 to 8 mph becoming west in the afternoon.
Mostly Cloudy on Wednesday Night Wednesday Night... Mostly cloudy, with a low around 15.
Mostly Sunny on Thursday Thursday... Mostly sunny, with a high near 23.
20% chance of snow Thursday Night Thursday Night... A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 12.
30% chance of snow Friday Friday... A 30 percent chance of snow. Mostly cloudy, with a high near 34.
20% chance of snow Friday Night Friday Night... A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 26.
Partly Sunny on Saturday Saturday... Partly sunny, with a high near 39.
Mostly Cloudy on Saturday Night Saturday Night... Mostly cloudy, with a low around 25.
Mostly Cloudy on Sunday Sunday... Mostly cloudy, with a high near 36.
Current Radar Image


Sun Almanac for Troy, Illinois
Sunrise: 06:59 AM
Sunset: 4:38 PM
Civil Sunrise:06:30 AM
Civil Sunset: 5:08 PM
Nautical Sunrise: 05:57 AM
Nautical Sunset: 5:41 PM
Astro Sunrise: 05:25 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.