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Troy, Illinois Weather Forecast
Troy, Illinois Weather
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Click for Winter Storm Watch for Troy, Illinois
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Weather Forecast for Troy, Illinois : Madison County
Issued: 9:51 pm CST Jan 21, 2026 Latitude: 38.7292147 Longitude: -89.8831541 View on Google Maps

MouseOver for Detail Forecast
Tonight Thursday Friday Saturday Sunday Monday Tuesday Wednesday
Mostly Clear on Tonight Partly Sunny on Thursday Mostly Cloudy on Friday 60% chance of snow on Saturday 50% chance of snow on Sunday Sunny on Monday Mostly Sunny on Tuesday Partly Sunny on Wednesday
Low: 24°F High: 37°F High: 15°F High: 14°F High: 19°F High: 16°F High: 29°F High: 26°F
Low: 12°F Low: 3 °F Low: 9 °F Low: -2°F Low: 1°F Low: 12°F  
Mostly Clear Partly Sunny Mostly Cloudy Snow Snow Sunny Mostly Sunny Partly Sunny
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Current Conditions at
SCOTT AFB - (KBLV)
34°
Clear
as of 8:55 PM CST
Rel. Humidity: 50%
Dew Point: 18°F
Visibility: 10 Miles
Pressure: 30.12 in.
Flight Rule: VFR
Wind Data
6 MPH
230° Southwest
Cloud Level(s): Clear
Current Conditions at
ALTON - (KALN)
36°
Clear
as of 8:50 PM CST
Rel. Humidity: 47%
Dew Point: 18°F
Visibility: 10 Miles
Pressure: 30.11 in.
Flight Rule: VFR
Wind Data
8 MPH
220° Southwest
Cloud Level(s): Clear
Current Conditions at
EAST ST LOUIS - (KCPS)
39°
Clear
as of 8:53 PM CST
Rel. Humidity: 41%
Dew Point: 18°F
Visibility: 10 Miles
Pressure: 30.13 in.
Flight Rule: VFR
Wind Data
7 MPH
230° Southwest
Cloud Level(s): Clear
Current Conditions at
ST LOUIS - (KSTL)
39°
Feels like 31°F
Mostly Clear
as of 8:51 PM CST
Rel. Humidity: 41%
Dew Point: 18°F
Visibility: 10 Miles
Pressure: 30.12 in.
Flight Rule: VFR
Wind Data
13 MPH
250° West
Cloud Level(s): Few at 8000ft
Mostly Clear on Tonight Tonight... Mostly clear, with a low around 24. South wind 5 to 11 mph becoming northwest after midnight. Winds could gust as high as 28 mph.
Partly Sunny on Thursday Thursday... Partly sunny, with a high near 37. West wind 3 to 7 mph.
Cloudy on Thursday Night Thursday Night... Partly cloudy, with a low around 12. Light and variable wind becoming north 11 to 16 mph in the evening. Winds could gust as high as 24 mph.
Mostly Cloudy on Friday Friday... Mostly cloudy and cold, with a high near 15. North wind 13 to 17 mph, with gusts as high as 25 mph.
30% chance of snow Friday Night Friday Night... A 30 percent chance of snow after midnight. Cloudy, with a low around 3. North wind 10 to 13 mph, with gusts as high as 20 mph.
60% chance of snow Saturday Saturday... Snow likely, mainly after noon. Cloudy and cold, with a high near 14. Chance of precipitation is 60%. New snow accumulation of 1 to 2 inches possible.
80% chance of snow Saturday Night Saturday Night... Snow. Low around 9. Chance of precipitation is 80%.
50% chance of snow Sunday Sunday... A 50 percent chance of snow, mainly before noon. Mostly cloudy and cold, with a high near 19.
Cloudy on Sunday Night Sunday Night... Partly cloudy, with a low around -2.
Sunny on Monday Monday... Sunny and cold, with a high near 16.
Mostly Clear on Monday Night Monday Night... Mostly clear, with a low around 1.
Mostly Sunny on Tuesday Tuesday... Mostly sunny, with a high near 29.
Cloudy on Tuesday Night Tuesday Night... Partly cloudy, with a low around 12.
Partly Sunny on Wednesday Wednesday... Partly sunny, with a high near 26.
Current Radar Image


Sun Almanac for Troy, Illinois
Sunrise: 07:13 AM
Sunset: 5:09 PM
Civil Sunrise:06:44 AM
Civil Sunset: 5:37 PM
Nautical Sunrise: 06:12 AM
Nautical Sunset: 6:10 PM
Astro Sunrise: 05:40 AM
Astro Sunset: 6:41 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.