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Troy, Illinois Weather Forecast
Troy, Illinois Weather
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Weather Forecast for Troy, Illinois : Madison County
Issued: 9:11 pm CST Jan 18, 2026 Latitude: 38.7292147 Longitude: -89.8831541 View on Google Maps

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Tonight M.L.King Day Tuesday Wednesday Thursday Friday Saturday Sunday
Cloudy on Tonight Sunny on M.L.King Day Mostly Sunny on Tuesday Mostly Sunny on Wednesday Sunny on Thursday Mostly Cloudy on Friday 30% chance of snow on Saturday 20% chance of snow on Sunday
Low: 10°F High: 20°F High: 35°F High: 45°F High: 35°F High: 38°F High: 25°F High: 20°F
Low: 12°F Low: 27°F Low: 22°F Low: 22°F Low: 16°F Low: 6°F  
Cloudy Sunny Mostly Sunny Mostly Sunny Sunny Mostly Cloudy Snow Snow
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Current Conditions at
SCOTT AFB - (KBLV)
30°
Cloudy
as of 8:55 PM CST
Rel. Humidity: 46%
Dew Point: 12°F
Visibility: 10 Miles
Pressure: 30.01 in.
Flight Rule: VFR
Wind Data
5 MPH
270° West
Cloud Level(s): Solid Overcast at 4900ft
Current Conditions at
ALTON - (KALN)
28°
Cloudy
as of 8:50 PM CST
Rel. Humidity: 46%
Dew Point: 10°F
Visibility: 10 Miles
Pressure: 30.01 in.
Flight Rule: VFR
Wind Data
6 MPH
240° Southwest
Cloud Level(s): Solid Overcast at 4800ft
Current Conditions at
EAST ST LOUIS - (KCPS)
32°
Cloudy
as of 8:53 PM CST
Rel. Humidity: 39%
Dew Point: 10°F
Visibility: 10 Miles
Pressure: 30.02 in.
Flight Rule: VFR
Wind Data
8 MPH
250° West
Cloud Level(s): Solid Overcast at 5000ft
Current Conditions at
ST LOUIS - (KSTL)
32°
Feels like 21°F
Mostly Cloudy
as of 8:51 PM CST
Rel. Humidity: 39%
Dew Point: 10°F
Visibility: 10 Miles
Pressure: 30.01 in.
Flight Rule: VFR
Wind Data
15 MPH
270° West
Cloud Level(s): Broken at 4900ft
Cloudy on Tonight Tonight... Partly cloudy, with a low around 10. Blustery, with a southwest wind 8 to 13 mph becoming northwest 16 to 21 mph after midnight. Winds could gust as high as 38 mph.

Sunny on M.L.King Day M.L.King Day... Sunny and cold, with a high near 20. Blustery, with a northwest wind 16 to 21 mph decreasing to 8 to 13 mph in the afternoon. Winds could gust as high as 31 mph.

Mostly Clear on Monday Night Monday Night... Mostly clear, with a low around 12. Light and variable wind becoming southwest around 6 mph in the evening.

Mostly Sunny on Tuesday Tuesday... Mostly sunny, with a high near 35. Southwest wind 5 to 10 mph.

Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 27. South wind 8 to 14 mph, with gusts as high as 22 mph.

Mostly Sunny on Wednesday Wednesday... Mostly sunny, with a high near 45.

Cloudy on Wednesday Night Wednesday Night... Partly cloudy, with a low around 22.

Sunny on Thursday Thursday... 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 38.

30% chance of snow Friday Night Friday Night... A 30 percent chance of snow. Mostly cloudy, with a low around 16.

30% chance of snow Saturday Saturday... A 30 percent chance of snow. Mostly cloudy, with a high near 25.

40% chance of snow Saturday Night Saturday Night... A 40 percent chance of snow. Mostly cloudy, with a low around 6.

20% chance of snow Sunday Sunday... A 20 percent chance of snow. Mostly sunny and cold, with a high near 20.

Current Radar Image


Sun Almanac for Troy, Illinois
Sunrise: 07:15 AM
Sunset: 5:05 PM
Civil Sunrise:06:46 AM
Civil Sunset: 5:34 PM
Nautical Sunrise: 06:13 AM
Nautical Sunset: 6:07 PM
Astro Sunrise: 05:42 AM
Astro Sunset: 6:39 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.