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Troy, Illinois Weather Forecast
Troy, Illinois Weather
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Weather Forecast for Troy, Illinois : Madison County
Issued: 8:21 pm CST Jan 22, 2026 Latitude: 38.7292147 Longitude: -89.8831541 View on Google Maps

MouseOver for Detail Forecast
Tonight Friday Saturday Sunday Monday Tuesday Wednesday Thursday
Cloudy on Tonight Partly Sunny on Friday 90% chance of snow on Saturday 70% chance of snow on Sunday Sunny on Monday Mostly Sunny on Tuesday Partly Sunny on Wednesday Partly Sunny on Thursday
Low: 8 °F High: 13°F High: 12°F High: 15°F High: 16°F High: 31°F High: 26°F High: 19°F
Low: 4 °F Low: 10°F Low: 0°F Low: 4°F Low: 14°F Low: 4°F  
Cloudy Partly Sunny Snow Snow Sunny Mostly Sunny Partly Sunny Partly Sunny
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Current Conditions at
SCOTT AFB - (KBLV)
25°
Clear
as of 9:55 PM CST
Rel. Humidity: 62%
Dew Point: 14°F
Visibility: 10 Miles
Pressure: 30.32 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
ALTON - (KALN)
23°
Clear
as of 9:45 PM CST
Rel. Humidity: 57%
Dew Point: 10°F
Visibility: 10 Miles
Pressure: 30.34 in.
Flight Rule: VFR
Wind Data
3 MPH
Cloud Level(s): Clear
Current Conditions at
EAST ST LOUIS - (KCPS)
21°
Clear
as of 9:53 PM CST
Rel. Humidity: 67%
Dew Point: 12°F
Visibility: 10 Miles
Pressure: 30.33 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
ST LOUIS - (KSTL)
27°
Mostly Cloudy
as of 9:51 PM CST
Rel. Humidity: 49%
Dew Point: 10°F
Visibility: 10 Miles
Pressure: 30.34 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Broken at 25000ft
Cloudy on Tonight Tonight... Partly cloudy, with a low around 8. West wind 6 to 11 mph becoming north 12 to 17 mph after midnight. Winds could gust as high as 25 mph.

Partly Sunny on Friday Friday... Partly sunny and cold, with a high near 13. Wind chill values as low as -10. North wind 14 to 18 mph, with gusts as high as 26 mph.

20% chance of snow Friday Night Friday Night... A 20 percent chance of snow after 3am. Mostly cloudy, with a low around 4. Wind chill values as low as -10. Northeast wind 11 to 13 mph, with gusts as high as 20 mph.

90% chance of snow Saturday Saturday... Snow, mainly after 9am. High near 12. Wind chill values as low as -10. Northeast wind 9 to 11 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

90% chance of snow Saturday Night Saturday Night... Snow. Low around 10. North wind 8 to 11 mph. Chance of precipitation is 90%. New snow accumulation of 3 to 5 inches possible.

70% chance of snow Sunday Sunday... Snow likely, mainly before noon. Cloudy and cold, with a high near 15. Chance of precipitation is 70%. New snow accumulation of 2 to 4 inches possible.

20% chance of snow Sunday Night Sunday Night... A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 0.

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 4.

Mostly Sunny on Tuesday Tuesday... Mostly sunny, with a high near 31.

Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 14.

Partly Sunny on Wednesday Wednesday... Partly sunny, with a high near 26.

Cloudy on Wednesday Night Wednesday Night... Partly cloudy, with a low around 4.

Partly Sunny on Thursday Thursday... Partly sunny and cold, with a high near 19.

Current Radar Image


Sun Almanac for Troy, Illinois
Sunrise: 07:13 AM
Sunset: 5:10 PM
Civil Sunrise:06:44 AM
Civil Sunset: 5:38 PM
Nautical Sunrise: 06:12 AM
Nautical Sunset: 6:11 PM
Astro Sunrise: 05:40 AM
Astro Sunset: 6:42 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.