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Troy, Illinois Weather Forecast
Troy, Illinois Weather
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Weather Forecast for Troy, Illinois : Madison County
Issued: 10:51 am CST Dec 20, 2025 Latitude: 38.7292147 Longitude: -89.8831541 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Sunday Monday Tuesday Wednesday Christmas Day Friday
Mostly Sunny on This Afternoon Cloudy on Tonight Sunny on Sunday Partly Sunny on Monday Mostly Sunny on Tuesday Cloudy on Wednesday Sunny on Christmas Day Partly Sunny on Friday
High: 54°F Low: 27°F High: 43°F High: 50°F High: 61°F High: 69°F High: 74°F High: 67°F
Low: 29°F Low: 45°F Low: 47°F Low: 58°F Low: 53°F  
Mostly Sunny Cloudy Sunny Partly Sunny Mostly Sunny Cloudy Sunny Partly Sunny
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Current Conditions at
SCOTT AFB - (KBLV)
54°
Clear
as of 11:55 AM CST
Rel. Humidity: 43%
Dew Point: 32°F
Visibility: 10 Miles
Pressure: 29.84 in.
Flight Rule: VFR
Wind Data
13 MPH
240° Southwest
Cloud Level(s): Clear
Current Conditions at
ALTON - (KALN)
50°
Feels like 46°F
Clear
as of 11:45 AM CST
Rel. Humidity: 46%
Dew Point: 30°F
Visibility: 10 Miles
Pressure: 29.85 in.
Flight Rule: VFR
Wind Data
9 MPH
220° Southwest
Cloud Level(s): Clear
Current Conditions at
EAST ST LOUIS - (KCPS)
54°
Clear
as of 11:53 AM CST
Rel. Humidity: 40%
Dew Point: 30°F
Visibility: 10 Miles
Pressure: 29.85 in.
Flight Rule: VFR
Wind Data
12 MPH
Gust: 20 MPH
210° Southwest
Cloud Level(s): Clear
Current Conditions at
ST LOUIS - (KSTL)
55°
Mostly Cloudy
as of 11:51 AM CST
Rel. Humidity: 35%
Dew Point: 28°F
Visibility: 10 Miles
Pressure: 29.85 in.
Flight Rule: VFR
Wind Data
13 MPH
250° West
Cloud Level(s): Few at 20000ft, Broken at 25000ft
Mostly Sunny on This Afternoon This Afternoon... Mostly sunny, with a high near 54. Southwest wind 9 to 11 mph becoming northwest. Winds could gust as high as 20 mph.

Cloudy on Tonight Tonight... Partly cloudy, with a low around 27. North wind 5 to 9 mph becoming light after midnight.

Sunny on Sunday Sunday... Sunny, with a high near 43. Light and variable wind becoming east around 6 mph in the afternoon.

Cloudy on Sunday Night Sunday Night... Partly cloudy, with a low around 29. Southeast wind 5 to 8 mph.

Partly Sunny on Monday Monday... Partly sunny, with a high near 50. Southeast wind 8 to 11 mph.

Mostly Cloudy on Monday Night Monday Night... Mostly cloudy, with a low around 45.

Mostly Sunny on Tuesday Tuesday... Mostly sunny, with a high near 61.

Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 47.

Cloudy on Wednesday Wednesday... Cloudy, with a high near 69.

Cloudy on Wednesday Night Wednesday Night... Partly cloudy, with a low around 58.

Sunny on Christmas Day Christmas Day... Sunny, with a high near 74.

Mostly Clear on Thursday Night Thursday Night... Mostly clear, with a low around 53.

Partly Sunny on Friday Friday... Partly sunny, with a high near 67.

Current Radar Image


Sun Almanac for Troy, Illinois
Sunrise: 07:14 AM
Sunset: 4:41 PM
Civil Sunrise:06:44 AM
Civil Sunset: 5:11 PM
Nautical Sunrise: 06:10 AM
Nautical Sunset: 5:44 PM
Astro Sunrise: 05:38 AM
Astro Sunset: 6:17 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.