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Troy, Illinois Weather Forecast
Troy, Illinois Weather
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Weather Forecast for Troy, Illinois : Madison County
Issued: 3:16 am CST Jan 17, 2026 Latitude: 38.7292147 Longitude: -89.8831541 View on Google Maps

MouseOver for Detail Forecast
Overnight Saturday Sunday M.L.King Day Tuesday Wednesday Thursday Friday
20% chance of snow on Overnight 20% chance of snow on Saturday 20% chance of snow on Sunday Sunny on M.L.King Day Mostly Sunny on Tuesday Partly Sunny on Wednesday 20% chance of snow on Thursday 20% chance of rain on Friday
Low: 21°F High: 26°F High: 32°F High: 21°F High: 37°F High: 46°F High: 34°F High: 36°F
Low: 12°F Low: 11°F Low: 11°F Low: 29°F Low: 21°F Low: 18°F  
Snow Snow Snow Sunny Mostly Sunny Partly Sunny Snow Rain
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Current Conditions at
SCOTT AFB - (KBLV)
28°
Cloudy
as of 3:55 AM CST
Rel. Humidity: 42%
Dew Point: 9°F
Visibility: 10 Miles
Pressure: 29.97 in.
Flight Rule: VFR
Wind Data
7 MPH
290° West
Cloud Level(s): Solid Overcast at 6000ft
Current Conditions at
ALTON - (KALN)
25°
Feels like 14°F
Cloudy
as of 4:15 AM CST
Rel. Humidity: 45%
Dew Point: 7°F
Visibility: 10 Miles
Pressure: 29.98 in.
Flight Rule: VFR
Wind Data
10 MPH
290° West
Cloud Level(s): Solid Overcast at 6500ft
Current Conditions at
EAST ST LOUIS - (KCPS)
25°
Cloudy
as of 3:53 AM CST
Rel. Humidity: 49%
Dew Point: 9°F
Visibility: 10 Miles
Pressure: 29.98 in.
Flight Rule: VFR
Wind Data
6 MPH
300° Northwest
Cloud Level(s): Solid Overcast at 6000ft
Current Conditions at
ST LOUIS - (KSTL)
25°
Feels like 13°F
Mostly Cloudy
as of 3:51 AM CST
Rel. Humidity: 38%
Dew Point: 3°F
Visibility: 10 Miles
Pressure: 29.98 in.
Flight Rule: VFR
Wind Data
12 MPH
290° West
Cloud Level(s): Broken at 6000ft
20% chance of snow Overnight Overnight... A chance of flurries. Mostly clear, with a low around 21. West wind around 11 mph, with gusts as high as 23 mph.

20% chance of snow Saturday Saturday... A chance of flurries. Increasing clouds, with a high near 26. West wind 11 to 18 mph, with gusts as high as 25 mph.

20% chance of snow Saturday Night Saturday Night... A chance of flurries before 7pm. Mostly cloudy during the early evening, then gradual clearing, with a low around 12. West wind 7 to 15 mph, with gusts as high as 23 mph.

20% chance of snow Sunday Sunday... A chance of flurries after noon. Increasing clouds, with a high near 32. Southwest wind 6 to 15 mph.

Cloudy on Sunday Night Sunday Night... Partly cloudy, with a low around 11. Southwest wind 9 to 17 mph becoming northwest after midnight. Winds could gust as high as 26 mph.

Sunny on M.L.King Day M.L.King Day... Sunny, with a high near 21.

Mostly Clear on Monday Night Monday Night... Mostly clear, with a low around 11.

Mostly Sunny on Tuesday Tuesday... Mostly sunny, with a high near 37.

Cloudy on Tuesday Night Tuesday Night... Partly cloudy, with a low around 29.

Partly Sunny on Wednesday Wednesday... Partly sunny, with a high near 46.

20% chance of rain & snow Wednesday Night Wednesday Night... A slight chance of rain and snow. Partly cloudy, with a low around 21. Chance of precipitation is 20%.

20% chance of snow Thursday Thursday... A 20 percent chance of snow. Mostly sunny, with a high near 34.

20% chance of snow Thursday Night Thursday Night... A 20 percent chance of snow. Partly cloudy, with a low around 18.

20% chance of rain Friday Friday... A 20 percent chance of rain. Mostly sunny, with a high near 36.

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.