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Troy, Illinois Weather Forecast
Troy, Illinois Weather
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Click for Wind Advisory for Troy, Illinois
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Weather Forecast for Troy, Illinois : Madison County
Issued: 3:16 am CST Dec 29, 2025 Latitude: 38.7292147 Longitude: -89.8831541 View on Google Maps

MouseOver for Detail Forecast
Overnight Monday Tuesday Wednesday New Year's Day Friday Saturday Sunday
20% chance of snow on Overnight Partly Sunny on Monday Increasing Clouds on Tuesday Partly Sunny on Wednesday Mostly Sunny on New Year's Day Mostly Cloudy on Friday Mostly Sunny on Saturday Mostly Sunny on Sunday
Low: 16°F High: 29°F High: 35°F High: 43°F High: 35°F High: 39°F High: 40°F High: 43°F
Low: 17°F Low: 27°F Low: 25°F Low: 22°F Low: 24°F Low: 22°F  
Snow Partly Sunny Increasing Clouds Partly Sunny Mostly Sunny Mostly Cloudy Mostly Sunny Mostly Sunny
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Current Conditions at
SCOTT AFB - (KBLV)
23°
Feels like 7°F
Cloudy
as of 2:55 AM CST
Rel. Humidity: 53%
Dew Point: 9°F
Visibility: 10 Miles
Pressure: 30.08 in.
Flight Rule: VFR
Wind Data
21 MPH
Gust: 29 MPH
290° West
Cloud Level(s): Solid Overcast at 3900ft
Current Conditions at
ALTON - (KALN)
19°
Feels like 4°F
Cloudy
as of 3:15 AM CST
Rel. Humidity: 62%
Dew Point: 9°F
Visibility: 10 Miles
Pressure: 30.10 in.
Flight Rule: VFR
Wind Data
17 MPH
Gust: 33 MPH
300° Northwest
Cloud Level(s): Scattered at 3200ft, Solid Overcast at 3900ft
Current Conditions at
EAST ST LOUIS - (KCPS)
21°
Feels like 4°F
Cloudy
Light Snow
as of 2:53 AM CST
Rel. Humidity: 48%
Dew Point: 5°F
Visibility: 9 Miles
Pressure: 30.12 in.
Flight Rule: VFR
Wind Data
23 MPH
Gust: 49 MPH
290° West
Cloud Level(s): Solid Overcast at 4400ft
Current Conditions at
ST LOUIS - (KSTL)
18°
Feels like 0°F
Mostly Cloudy
as of 3:23 AM CST
Rel. Humidity: 52%
Dew Point: 3°F
Visibility: 10 Miles
Pressure: 30.13 in.
Flight Rule: VFR
Wind Data
22 MPH
Gust: 38 MPH
300° Northwest
Cloud Level(s): Broken at 3400ft, Broken at 4100ft
20% chance of snow Overnight Overnight... A chance of flurries before 5am. Partly cloudy, with a low around 16. Breezy, with a west wind around 29 mph, with gusts as high as 39 mph.
Partly Sunny on Monday Monday... Partly sunny, with a high near 29. Breezy, with a northwest wind 17 to 26 mph, with gusts as high as 38 mph.
Mostly Clear on Monday Night Monday Night... Mostly clear, with a low around 17. Northwest wind 9 to 16 mph, with gusts as high as 23 mph.
Increasing Clouds on Tuesday Tuesday... Increasing clouds, with a high near 35. West wind 7 to 10 mph.
Mostly Clear on Tuesday Night Tuesday Night... Mostly clear, with a low around 27. West wind 6 to 8 mph.
Partly Sunny on Wednesday Wednesday... Partly sunny, with a high near 43.
Cloudy on Wednesday Night Wednesday Night... Partly cloudy, with a low around 25.
Mostly Sunny on New Year's Day New Year's Day... Mostly sunny, with a high near 35.
Cloudy on Thursday Night Thursday Night... Partly cloudy, with a low around 22.
Mostly Cloudy on Friday Friday... Mostly cloudy, with a high near 39.
Mostly Cloudy on Friday Night Friday Night... Mostly cloudy, with a low around 24.
Mostly Sunny on Saturday Saturday... Mostly sunny, with a high near 40.
Cloudy on Saturday Night Saturday Night... Partly cloudy, with a low around 22.
Mostly Sunny on Sunday Sunday... Mostly sunny, with a high near 43.
Current Radar Image


Sun Almanac for Troy, Illinois
Sunrise: 07:17 AM
Sunset: 4:46 PM
Civil Sunrise:06:47 AM
Civil Sunset: 5:16 PM
Nautical Sunrise: 06:14 AM
Nautical Sunset: 5:50 PM
Astro Sunrise: 05:42 AM
Astro Sunset: 6:22 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.