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Troy, Illinois Weather Forecast
Troy, Illinois Weather
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Weather Forecast for Troy, Illinois : Madison County
Issued: 1:26 pm CST Dec 8, 2025 Latitude: 38.7292147 Longitude: -89.8831541 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Tuesday Wednesday Thursday Friday Saturday Sunday
Sunny on This Afternoon Cloudy on Tonight Mostly Sunny on Tuesday Partly Sunny on Wednesday 20% chance of snow on Thursday Partly Sunny on Friday Partly Sunny on Saturday Mostly Sunny on Sunday
High: 33°F Low: 25°F High: 52°F High: 37 °F High: 37°F High: 32°F High: 19°F High: 27°F
Low: 43°F Low: 26°F Low: 22°F Low: 8°F Low: 9°F  
Sunny Cloudy Mostly Sunny Partly Sunny Snow Partly Sunny Partly Sunny Mostly Sunny
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Current Conditions at
SCOTT AFB - (KBLV)
36°
Clear
as of 12:55 PM CST
Rel. Humidity: 55%
Dew Point: 21°F
Visibility: 10 Miles
Pressure: 30.29 in.
Flight Rule: VFR
Wind Data
5 MPH
350° North
Cloud Level(s): Clear
Current Conditions at
ALTON - (KALN)
30°
Clear
as of 12:45 PM CST
Rel. Humidity: 63%
Dew Point: 19°F
Visibility: 10 Miles
Pressure: 30.30 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
EAST ST LOUIS - (KCPS)
34°
Clear
as of 12:53 PM CST
Rel. Humidity: 59%
Dew Point: 21°F
Visibility: 10 Miles
Pressure: 30.30 in.
Flight Rule: VFR
Wind Data
5 MPH
280° West
Cloud Level(s): Clear
Current Conditions at
ST LOUIS - (KSTL)
32°
Partly Cloudy
as of 12:51 PM CST
Rel. Humidity: 63%
Dew Point: 21°F
Visibility: 10 Miles
Pressure: 30.30 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Scattered at 25000ft
Sunny on This Afternoon This Afternoon... Sunny, with a high near 33. Light and variable wind.
Cloudy on Tonight Tonight... Partly cloudy, with a low around 25. Light and variable wind becoming south 5 to 10 mph in the evening.
Mostly Sunny on Tuesday Tuesday... Mostly sunny, with a high near 52. Southwest wind 10 to 13 mph, with gusts as high as 22 mph.
Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 43. South wind 14 to 17 mph becoming west after midnight. Winds could gust as high as 30 mph.
Partly Sunny on Wednesday Wednesday... Partly sunny, with a temperature falling to around 37 by 5pm. Breezy, with a northwest wind 13 to 20 mph, with gusts as high as 31 mph.
Mostly Cloudy on Wednesday Night Wednesday Night... Mostly cloudy, with a low around 26.
20% chance of snow Thursday Thursday... A 20 percent chance of snow before noon. Mostly cloudy, with a high near 37.
Mostly Cloudy on Thursday Night Thursday Night... Mostly cloudy, with a low around 22.
Partly Sunny on Friday Friday... Partly sunny, with a high near 32.
Mostly Cloudy on Friday Night Friday Night... Mostly cloudy, with a low around 8.
Partly Sunny on Saturday Saturday... Partly sunny and cold, with a high near 19.
Mostly Cloudy on Saturday Night Saturday Night... Mostly cloudy, with a low around 9.
Mostly Sunny on Sunday Sunday... Mostly sunny, with a high near 27.
Current Radar Image


Sun Almanac for Troy, Illinois
Sunrise: 07:06 AM
Sunset: 4:38 PM
Civil Sunrise:06:36 AM
Civil Sunset: 5:07 PM
Nautical Sunrise: 06:03 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.