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Troy, Illinois Weather Forecast
Troy, Illinois Weather
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Weather Forecast for Troy, Illinois : Madison County
Issued: 12:31 am CST Jan 12, 2026 Latitude: 38.7292147 Longitude: -89.8831541 View on Google Maps

MouseOver for Detail Forecast
Overnight Monday Tuesday Wednesday Thursday Friday Saturday Sunday
Clear on Overnight Sunny on Monday Increasing Clouds on Tuesday Mostly Cloudy on Wednesday Mostly Sunny on Thursday Partly Sunny on Friday Mostly Cloudy on Saturday Mostly Sunny on Sunday
Low: 25°F High: 50°F High: 59°F High: 43°F High: 33°F High: 42°F High: 32°F High: 32°F
Low: 35°F Low: 38°F Low: 19°F Low: 26°F Low: 23°F Low: 14°F  
Clear Sunny Increasing Clouds Mostly Cloudy Mostly Sunny Partly Sunny Mostly Cloudy Mostly Sunny
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Current Conditions at
SCOTT AFB - (KBLV)
27°
Clear
as of 1:55 AM CST
Rel. Humidity: 73%
Dew Point: 19°F
Visibility: 10 Miles
Pressure: 30.39 in.
Flight Rule: VFR
Wind Data
5 MPH
180° South
Cloud Level(s): Clear
Current Conditions at
ALTON - (KALN)
28°
Clear
as of 1:55 AM CST
Rel. Humidity: 68%
Dew Point: 19°F
Visibility: 10 Miles
Pressure: 30.38 in.
Flight Rule: VFR
Wind Data
6 MPH
190° South
Cloud Level(s): Clear
Current Conditions at
EAST ST LOUIS - (KCPS)
21°
Clear
as of 1:53 AM CST
Rel. Humidity: 85%
Dew Point: 18°F
Visibility: 10 Miles
Pressure: 30.39 in.
Flight Rule: VFR
Wind Data
6 MPH
180° South
Cloud Level(s): Clear
Current Conditions at
ST LOUIS - (KSTL)
30°
Clear
as of 1:51 AM CST
Rel. Humidity: 58%
Dew Point: 18°F
Visibility: 10 Miles
Pressure: 30.37 in.
Flight Rule: VFR
Wind Data
8 MPH
210° Southwest
Cloud Level(s): Clear
Clear on Overnight Overnight... Clear, with a low around 25. South wind 5 to 7 mph.
Sunny on Monday Monday... Sunny, with a high near 50. Southwest wind 7 to 11 mph, with gusts as high as 21 mph.
Mostly Clear on Monday Night Monday Night... Mostly clear, with a low around 35. Southwest wind 6 to 8 mph.
Increasing Clouds on Tuesday Tuesday... Increasing clouds, with a high near 59. Southwest wind 9 to 15 mph, with gusts as high as 26 mph.
20% chance of rain Tuesday Night Tuesday Night... A 20 percent chance of rain before midnight. Mostly cloudy, with a low around 38. West wind 9 to 11 mph, with gusts as high as 20 mph.
Mostly Cloudy on Wednesday Wednesday... Mostly cloudy, with a high near 43. Breezy.
Mostly Cloudy on Wednesday Night Wednesday Night... Mostly cloudy, with a low around 19. Blustery.
Mostly Sunny on Thursday Thursday... Mostly sunny, with a high near 33.
Mostly Cloudy on Thursday Night Thursday Night... Mostly cloudy, with a low around 26.
Partly Sunny on Friday Friday... Partly sunny, with a high near 42.
Mostly Cloudy on Friday Night Friday Night... Mostly cloudy, with a low around 23.
Mostly Cloudy on Saturday Saturday... Mostly cloudy, with a high near 32.
Cloudy on Saturday Night Saturday Night... Partly cloudy, with a low around 14.
Mostly Sunny on Sunday Sunday... Mostly sunny, with a high near 32.
Current Radar Image


Sun Almanac for Troy, Illinois
Sunrise: 07:17 AM
Sunset: 4:59 PM
Civil Sunrise:06:48 AM
Civil Sunset: 5:28 PM
Nautical Sunrise: 06:15 AM
Nautical Sunset: 6:01 PM
Astro Sunrise: 05:43 AM
Astro Sunset: 6:33 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.