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Troy, Illinois Weather Forecast
Troy, Illinois Weather
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Weather Forecast for Troy, Illinois : Madison County
Issued: 4:56 pm CST Dec 6, 2025 Latitude: 38.7292147 Longitude: -89.8831541 View on Google Maps

MouseOver for Detail Forecast
Tonight Sunday Monday Tuesday Wednesday Thursday Friday Saturday
Cloudy on Tonight 20% chance of snow on Sunday Mostly Cloudy on Monday Mostly Sunny on Tuesday Partly Sunny on Wednesday 20% chance of snow on Thursday Partly Sunny on Friday Mostly Sunny on Saturday
Low: 33°F High: 38°F High: 33°F High: 50°F High: 47°F High: 37°F High: 27°F High: 22°F
Low: 20°F Low: 24°F Low: 40°F Low: 27°F Low: 19°F Low: 8°F  
Cloudy Snow Mostly Cloudy Mostly Sunny Partly Sunny Snow Partly Sunny Mostly Sunny
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Current Conditions at
SCOTT AFB - (KBLV)
41°
Clear
as of 6:55 PM CST
Rel. Humidity: 75%
Dew Point: 34°F
Visibility: 10 Miles
Pressure: 29.92 in.
Flight Rule: VFR
Wind Data
5 MPH
180° South
Cloud Level(s): Clear
Current Conditions at
ALTON - (KALN)
36°
Clear
as of 6:50 PM CST
Rel. Humidity: 80%
Dew Point: 30°F
Visibility: 10 Miles
Pressure: 29.92 in.
Flight Rule: VFR
Wind Data
7 MPH
110° East
Cloud Level(s): Clear
Current Conditions at
EAST ST LOUIS - (KCPS)
43°
Clear
as of 6:53 PM CST
Rel. Humidity: 70%
Dew Point: 34°F
Visibility: 10 Miles
Pressure: 29.92 in.
Flight Rule: VFR
Wind Data
8 MPH
160° South
Cloud Level(s): Clear
Current Conditions at
ST LOUIS - (KSTL)
43°
Feels like 36°F
Mostly Cloudy
as of 6:51 PM CST
Rel. Humidity: 70%
Dew Point: 34°F
Visibility: 10 Miles
Pressure: 29.90 in.
Flight Rule: VFR
Wind Data
12 MPH
150° Southeast
Cloud Level(s): Broken at 16000ft, Broken at 22000ft
Cloudy on Tonight Tonight... Cloudy, with a low around 33. South wind 5 to 8 mph, with gusts as high as 20 mph.

20% chance of snow Sunday Sunday... A slight chance of drizzle, mixing with snow after 4pm, then gradually ending. Cloudy, with a high near 38. Light and variable wind becoming north 8 to 13 mph in the morning. Winds could gust as high as 23 mph. Chance of precipitation is 20%.

Mostly Cloudy on Sunday Night Sunday Night... Mostly cloudy, with a low around 20. North wind 7 to 13 mph, with gusts as high as 22 mph.

Mostly Cloudy on Monday Monday... Mostly cloudy, then gradually becoming sunny, with a high near 33. North wind 5 to 7 mph becoming light and variable in the morning.

Cloudy on Monday Night Monday Night... Partly cloudy, with a low around 24. Light south wind increasing to 5 to 10 mph in the evening.

Mostly Sunny on Tuesday Tuesday... Mostly sunny, with a high near 50.

Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 40.

Partly Sunny on Wednesday Wednesday... Partly sunny, with a high near 47.

20% chance of rain & snow Wednesday Night Wednesday Night... A slight chance of rain and snow before midnight, then a slight chance of snow. Mostly cloudy, with a low around 27. Chance of precipitation is 20%.

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 19.

Partly Sunny on Friday Friday... Partly sunny, with a high near 27.

Cloudy on Friday Night Friday Night... Partly cloudy, with a low around 8.

Mostly Sunny on Saturday Saturday... Mostly sunny, with a high near 22.

Current Radar Image


Sun Almanac for Troy, Illinois
Sunrise: 07:04 AM
Sunset: 4:38 PM
Civil Sunrise:06:34 AM
Civil Sunset: 5:07 PM
Nautical Sunrise: 06:01 AM
Nautical Sunset: 5:40 PM
Astro Sunrise: 05:29 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.