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Troy, Illinois Weather Forecast
Troy, Illinois Weather
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Weather Forecast for Troy, Illinois : Madison County
Issued: 10:47 am CST Jan 27, 2026 Latitude: 38.7292147 Longitude: -89.8831541 View on Google Maps

MouseOver for Detail Forecast
Today Tonight Wednesday Thursday Friday Saturday Sunday Monday
Sunny on Today Mostly Clear on Tonight Increasing Clouds on Wednesday Mostly Cloudy on Thursday Mostly Sunny on Friday Mostly Sunny on Saturday Partly Sunny on Sunday Partly Sunny on Monday
High: 29°F Low: 0 °F High: 28°F High: 19°F High: 14°F High: 17°F High: 25°F High: 32°F
Low: 7 °F Low: 1°F Low: -1°F Low: 2°F Low: 12°F  
Sunny Mostly Clear Increasing Clouds Mostly Cloudy Mostly Sunny Mostly Sunny Partly Sunny Partly Sunny
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Current Conditions at
SCOTT AFB - (KBLV)
27°
Feels like 14°F
Clear
as of 10:55 AM CST
Rel. Humidity: 63%
Dew Point: 16°F
Visibility: 10 Miles
Pressure: 30.29 in.
Flight Rule: VFR
Wind Data
15 MPH
290° West
Cloud Level(s): Clear
Current Conditions at
ALTON - (KALN)
25°
Feels like 12°F
Clear
as of 10:50 AM CST
Rel. Humidity: 58%
Dew Point: 12°F
Visibility: 10 Miles
Pressure: 30.30 in.
Flight Rule: VFR
Wind Data
14 MPH
300° Northwest
Cloud Level(s): Clear
Current Conditions at
EAST ST LOUIS - (KCPS)
27°
Feels like 14°F
Clear
as of 10:53 AM CST
Rel. Humidity: 53%
Dew Point: 12°F
Visibility: 10 Miles
Pressure: 30.31 in.
Flight Rule: VFR
Wind Data
15 MPH
300° Northwest
Cloud Level(s): Clear
Current Conditions at
ST LOUIS - (KSTL)
25°
Feels like 9°F
Clear
as of 10:51 AM CST
Rel. Humidity: 58%
Dew Point: 12°F
Visibility: 10 Miles
Pressure: 30.30 in.
Flight Rule: VFR
Wind Data
22 MPH
Gust: 29 MPH
290° West
Cloud Level(s): Clear
Sunny on Today Today... Sunny, with a high near 29. Northwest wind 8 to 14 mph, with gusts as high as 25 mph.

Mostly Clear on Tonight Tonight... Mostly clear, with a low around 0. Northwest wind 5 to 7 mph becoming calm in the evening.

Increasing Clouds on Wednesday Wednesday... Increasing clouds, with a high near 28. Light southwest wind becoming west 5 to 10 mph in the morning.

Partly Cloudy on Wednesday Night Wednesday Night... Cloudy, then gradually becoming partly cloudy, with a low around 7. Southwest wind around 5 mph becoming calm in the evening.

Mostly Cloudy on Thursday Thursday... Mostly cloudy and cold, with a high near 19. North wind 3 to 6 mph.

Mostly Cloudy on Thursday Night Thursday Night... Mostly cloudy, with a low around 1.

Mostly Sunny on Friday Friday... Mostly sunny and cold, with a high near 14.

Mostly Clear on Friday Night Friday Night... Mostly clear, with a low around -1.

Mostly Sunny on Saturday Saturday... Mostly sunny and cold, with a high near 17.

Cloudy on Saturday Night Saturday Night... Partly cloudy, with a low around 2.

Partly Sunny on Sunday Sunday... Partly sunny, with a high near 25.

Mostly Cloudy on Sunday Night Sunday Night... Mostly cloudy, with a low around 12.

Partly Sunny on Monday Monday... Partly sunny, with a high near 32.

Current Radar Image


Sun Almanac for Troy, Illinois
Sunrise: 07:09 AM
Sunset: 5:15 PM
Civil Sunrise:06:41 AM
Civil Sunset: 5:44 PM
Nautical Sunrise: 06:09 AM
Nautical Sunset: 6:16 PM
Astro Sunrise: 05:37 AM
Astro Sunset: 6:47 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.