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Troy, Illinois Weather Forecast
Troy, Illinois Weather
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Weather Forecast for Troy, Illinois : Madison County
Issued: 3:16 am CST Dec 19, 2025 Latitude: 38.7292147 Longitude: -89.8831541 View on Google Maps

MouseOver for Detail Forecast
Today Tonight Saturday Sunday Monday Tuesday Wednesday Christmas Day
Sunny on Today Mostly Clear on Tonight Mostly Sunny on Saturday Mostly Sunny on Sunday Partly Sunny on Monday Partly Sunny on Tuesday Mostly Cloudy on Wednesday Mostly Sunny on Christmas Day
High: 37°F Low: 31°F High: 53°F High: 42°F High: 46°F High: 60°F High: 67°F High: 71°F
Low: 28°F Low: 28°F Low: 41°F Low: 48°F Low: 57°F  
Sunny Mostly Clear Mostly Sunny Mostly Sunny Partly Sunny Partly Sunny Mostly Cloudy Mostly Sunny
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Current Conditions at
SCOTT AFB - (KBLV)
28°
Feels like 18°F
Mostly Cloudy
as of 3:55 AM CST
Rel. Humidity: 63%
Dew Point: 18°F
Visibility: 10 Miles
Pressure: 29.90 in.
Flight Rule: VFR
Wind Data
12 MPH
Gust: 22 MPH
270° West
Cloud Level(s): Broken at 3200ft
Current Conditions at
ALTON - (KALN)
27°
Feels like 12°F
Clear
as of 4:35 AM CST
Rel. Humidity: 63%
Dew Point: 16°F
Visibility: 10 Miles
Pressure: 29.91 in.
Flight Rule: VFR
Wind Data
22 MPH
Gust: 29 MPH
270° West
Cloud Level(s): Clear
Current Conditions at
EAST ST LOUIS - (KCPS)
27°
Feels like 13°F
Mostly Clear
as of 3:53 AM CST
Rel. Humidity: 63%
Dew Point: 16°F
Visibility: 10 Miles
Pressure: 29.93 in.
Flight Rule: VFR
Wind Data
17 MPH
Gust: 26 MPH
270° West
Cloud Level(s): Few at 3300ft
Current Conditions at
ST LOUIS - (KSTL)
27°
Feels like 12°F
Mostly Clear
as of 3:51 AM CST
Rel. Humidity: 63%
Dew Point: 16°F
Visibility: 10 Miles
Pressure: 29.92 in.
Flight Rule: VFR
Wind Data
21 MPH
Gust: 29 MPH
280° West
Cloud Level(s): Few at 3000ft, Few at 25000ft
Sunny on Today Today... Sunny, with a high near 37. West wind 13 to 18 mph becoming south 6 to 11 mph in the afternoon. Winds could gust as high as 29 mph.

Mostly Clear on Tonight Tonight... Mostly clear, with a low around 31. South wind 7 to 14 mph, with gusts as high as 24 mph.

Mostly Sunny on Saturday Saturday... Mostly sunny, with a high near 53. South wind 9 to 16 mph becoming northwest in the afternoon. Winds could gust as high as 24 mph.

Cloudy on Saturday Night Saturday Night... Partly cloudy, with a low around 28. Northwest wind 5 to 8 mph.

Mostly Sunny on Sunday Sunday... Mostly sunny, with a high near 42. Northwest wind around 6 mph becoming east in the afternoon.

Mostly Cloudy on Sunday Night Sunday Night... Mostly cloudy, with a low around 28.

Partly Sunny on Monday Monday... Partly sunny, with a high near 46.

Mostly Cloudy on Monday Night Monday Night... Mostly cloudy, with a low around 41.

Partly Sunny on Tuesday Tuesday... Partly sunny, with a high near 60.

Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 48.

Mostly Cloudy on Wednesday Wednesday... Mostly cloudy, with a high near 67.

Mostly Cloudy on Wednesday Night Wednesday Night... Mostly cloudy, with a low around 57.

Mostly Sunny on Christmas Day Christmas Day... Mostly sunny, with a high near 71.

Current Radar Image


Sun Almanac for Troy, Illinois
Sunrise: 07:13 AM
Sunset: 4:40 PM
Civil Sunrise:06:43 AM
Civil Sunset: 5:10 PM
Nautical Sunrise: 06:10 AM
Nautical Sunset: 5:44 PM
Astro Sunrise: 05:38 AM
Astro Sunset: 6:16 PM
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