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Troy, Illinois Weather Forecast
Troy, Illinois Weather
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Weather Forecast for Troy, Illinois : Madison County
Issued: 3:16 pm CST Dec 2, 2025 Latitude: 38.7292147 Longitude: -89.8831541 View on Google Maps

MouseOver for Detail Forecast
Tonight Wednesday Thursday Friday Saturday Sunday Monday Tuesday
Cloudy on Tonight Increasing Clouds on Wednesday Mostly Sunny on Thursday Mostly Sunny on Friday Partly Sunny on Saturday 20% chance of rain & snow on Sunday Partly Sunny on Monday Partly Sunny on Tuesday
Low: 17°F High: 40°F High: 23°F High: 36°F High: 37°F High: 34°F High: 33°F High: 41°F
Low: 15°F Low: 12°F Low: 22°F Low: 24°F Low: 18°F Low: 26°F  
Cloudy Increasing Clouds Mostly Sunny Mostly Sunny Partly Sunny Rain & Snow Partly Sunny Partly Sunny
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Current Conditions at
SCOTT AFB - (KBLV)
27°
Cloudy
as of 2:55 PM CST
Rel. Humidity: 79%
Dew Point: 21°F
Visibility: 10 Miles
Pressure: 30.09 in.
Flight Rule: MVFR
Wind Data
6 MPH
250° West
Cloud Level(s): Solid Overcast at 1500ft
Current Conditions at
ALTON - (KALN)
25°
Cloudy
as of 2:50 PM CST
Rel. Humidity: 79%
Dew Point: 19°F
Visibility: 10 Miles
Pressure: 30.10 in.
Flight Rule: MVFR
Wind Data
7 MPH
250° West
Cloud Level(s): Solid Overcast at 1300ft
Current Conditions at
EAST ST LOUIS - (KCPS)
27°
Cloudy
as of 2:53 PM CST
Rel. Humidity: 73%
Dew Point: 19°F
Visibility: 10 Miles
Pressure: 30.11 in.
Flight Rule: MVFR
Wind Data
5 MPH
240° Southwest
Cloud Level(s): Solid Overcast at 1500ft
Current Conditions at
ST LOUIS - (KSTL)
25°
Cloudy
as of 2:51 PM CST
Rel. Humidity: 79%
Dew Point: 19°F
Visibility: 10 Miles
Pressure: 30.09 in.
Flight Rule: MVFR
Wind Data
7 MPH
270° West
Cloud Level(s): Solid Overcast at 1400ft
Cloudy on Tonight Tonight... Partly cloudy, with a low around 17. Calm wind becoming south around 6 mph in the evening.

Increasing Clouds on Wednesday Wednesday... Increasing clouds, with a high near 40. South wind around 7 mph becoming northwest in the afternoon.

20% chance of snow Wednesday Night Wednesday Night... A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 15. North wind 6 to 11 mph.

Mostly Sunny on Thursday Thursday... Mostly sunny, with a high near 23. North wind 5 to 9 mph becoming light in the afternoon.

Cloudy on Thursday Night Thursday Night... Partly cloudy, with a low around 12. Light and variable wind.

Mostly Sunny on Friday Friday... Mostly sunny, with a high near 36.

Mostly Cloudy on Friday Night Friday Night... Mostly cloudy, with a low around 22.

Partly Sunny on Saturday Saturday... Partly sunny, with a high near 37.

Mostly Cloudy on Saturday Night Saturday Night... Mostly cloudy, with a low around 24.

20% chance of rain & snow Sunday Sunday... A slight chance of rain and snow after noon. Mostly cloudy, with a high near 34. Chance of precipitation is 20%.

20% chance of rain & snow Sunday Night Sunday Night... A slight chance of rain and snow. Mostly cloudy, with a low around 18. Chance of precipitation is 20%.

Partly Sunny on Monday Monday... Partly sunny, with a high near 33.

20% chance of snow Monday Night Monday Night... A 20 percent chance of snow. Mostly cloudy, with a low around 26.

Partly Sunny on Tuesday Tuesday... Partly sunny, with a high near 41.

Current Radar Image


Sun Almanac for Troy, Illinois
Sunrise: 07:00 AM
Sunset: 4:38 PM
Civil Sunrise:06:31 AM
Civil Sunset: 5:08 PM
Nautical Sunrise: 05:58 AM
Nautical Sunset: 5:41 PM
Astro Sunrise: 05:26 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.