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Troy, Illinois Weather Forecast
Troy, Illinois Weather
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Weather Forecast for Troy, Illinois : Madison County
Issued: 5:01 pm CST Jan 17, 2026 Latitude: 38.7292147 Longitude: -89.8831541 View on Google Maps

MouseOver for Detail Forecast
Tonight Sunday M.L.King Day Tuesday Wednesday Thursday Friday Saturday
20% chance of snow on Tonight 20% chance of snow on Sunday Sunny on M.L.King Day Mostly Sunny on Tuesday Mostly Sunny on Wednesday Sunny on Thursday 20% chance of rain on Friday 40% chance of snow on Saturday
Low: 13°F High: 32°F High: 20°F High: 36°F High: 43°F High: 36°F High: 42°F High: 30°F
Low: 11°F Low: 10°F Low: 28°F Low: 21°F Low: 23°F Low: 21°F  
Snow Snow Sunny Mostly Sunny Mostly Sunny Sunny Rain Snow
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Current Conditions at
SCOTT AFB - (KBLV)
19°
Feels like 5°F
Cloudy
as of 6:55 PM CST
Rel. Humidity: 52%
Dew Point: 5°F
Visibility: 10 Miles
Pressure: 30.29 in.
Flight Rule: VFR
Wind Data
15 MPH
290° West
Cloud Level(s): Solid Overcast at 5000ft
Current Conditions at
ALTON - (KALN)
16°
Feels like 2°F
Mostly Cloudy
as of 6:50 PM CST
Rel. Humidity: 56%
Dew Point: 3°F
Visibility: 10 Miles
Pressure: 30.29 in.
Flight Rule: VFR
Wind Data
13 MPH
280° West
Cloud Level(s): Scattered at 3700ft, Broken at 5000ft
Current Conditions at
EAST ST LOUIS - (KCPS)
18°
Feels like 3°F
Mostly Cloudy
as of 6:53 PM CST
Rel. Humidity: 48%
Dew Point: 1°F
Visibility: 10 Miles
Pressure: 30.31 in.
Flight Rule: VFR
Wind Data
14 MPH
Gust: 28 MPH
290° West
Cloud Level(s): Broken at 5500ft
Current Conditions at
ST LOUIS - (KSTL)
16°
Feels like 3°F
Mostly Cloudy
as of 6:51 PM CST
Rel. Humidity: 52%
Dew Point: 1°F
Visibility: 10 Miles
Pressure: 30.29 in.
Flight Rule: VFR
Wind Data
10 MPH
290° West
Cloud Level(s): Few at 4000ft, Broken at 5000ft
20% chance of snow Tonight Tonight... A chance of flurries before 11pm. Partly cloudy, with a low around 13. West wind 6 to 15 mph, with gusts as high as 22 mph.

20% chance of snow Sunday Sunday... A chance of flurries before 2pm, then a slight chance of snow between 2pm and 3pm, then a chance of flurries after 3pm. Increasing clouds, with a high near 32. Southwest wind 6 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.

20% chance of snow Sunday Night Sunday Night... A chance of flurries before 9pm. Partly cloudy, with a low around 11. Blustery, with a northwest wind 13 to 20 mph, with gusts as high as 29 mph.

Sunny on M.L.King Day M.L.King Day... Sunny and cold, with a high near 20. Northwest wind 8 to 18 mph, with gusts as high as 28 mph.

Mostly Clear on Monday Night Monday Night... Mostly clear, with a low around 10. Northwest wind around 6 mph becoming light and variable.

Mostly Sunny on Tuesday Tuesday... Mostly sunny, with a high near 36.

Cloudy on Tuesday Night Tuesday Night... Partly cloudy, with a low around 28.

Mostly Sunny on Wednesday Wednesday... Mostly sunny, with a high near 43.

Cloudy on Wednesday Night Wednesday Night... Partly cloudy, with a low around 21.

Sunny on Thursday Thursday... Sunny, with a high near 36.

Cloudy on Thursday Night Thursday Night... Partly cloudy, with a low around 23.

20% chance of rain Friday Friday... A 20 percent chance of rain. Mostly sunny, with a high near 42.

30% chance of rain & snow Friday Night Friday Night... A chance of rain and snow. Mostly cloudy, with a low around 21. Chance of precipitation is 30%.

40% chance of snow Saturday Saturday... A 40 percent chance of snow. Mostly cloudy, with a high near 30.

Current Radar Image


Sun Almanac for Troy, Illinois
Sunrise: 07:15 AM
Sunset: 5:04 PM
Civil Sunrise:06:46 AM
Civil Sunset: 5:33 PM
Nautical Sunrise: 06:14 AM
Nautical Sunset: 6:06 PM
Astro Sunrise: 05:42 AM
Astro Sunset: 6:38 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.