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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 25, 2026 Latitude: 38.7292147 Longitude: -89.8831541 View on Google Maps

MouseOver for Detail Forecast
Overnight Sunday Monday Tuesday Wednesday Thursday Friday Saturday
100% chance of snow on Overnight 100% chance of snow on Sunday Sunny on Monday Mostly Sunny on Tuesday Mostly Sunny on Wednesday Partly Sunny on Thursday Partly Sunny on Friday Mostly Sunny on Saturday
Low: 8 °F High: 14°F High: 14°F High: 30°F High: 23°F High: 19°F High: 21°F High: 20°F
Low: -5°F Low: 2 °F Low: -3°F Low: 0°F Low: 6°F Low: 3°F  
Snow Snow Sunny Mostly Sunny Mostly Sunny Partly Sunny Partly Sunny Mostly Sunny
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Current Conditions at
SCOTT AFB - (KBLV)
10°
Feels like -6°F
Cloudy
Blowing Snow
as of 4:25 AM CST
Rel. Humidity: 78%
Dew Point: 5°F
Visibility: 1 1/8 Miles
Pressure: 30.09 in.
Flight Rule: IFR
Wind Data
15 MPH
0° North
Cloud Level(s): Solid Overcast at 2000ft
Current Conditions at
ALTON - (KALN)
Feels like -4°F
Cloudy
Light Snow
as of 4:15 AM CST
Rel. Humidity: 78%
Dew Point: 3°F
Visibility: 1 3/4 Miles
Pressure: 30.14 in.
Flight Rule: IFR
Wind Data
9 MPH
010° North
Cloud Level(s): Solid Overcast at 1500ft
Current Conditions at
EAST ST LOUIS - (KCPS)
Feels like -7°F
Cloudy
Mist
as of 4:31 AM CST
Rel. Humidity: 84%
Dew Point: 5°F
Visibility: 2 1/2 Miles
Pressure: 30.14 in.
Flight Rule: IFR
Wind Data
13 MPH
0° North
Cloud Level(s): Solid Overcast at 2800ft
Current Conditions at
ST LOUIS - (KSTL)
Feels like -7°F
Cloudy
Snow Freezing Fog
as of 4:32 AM CST
Rel. Humidity: 78%
Dew Point: 3°F
Visibility: 1/2 Miles
Pressure: 30.14 in.
Flight Rule: IFR
Wind Data
13 MPH
0° North
100% chance of snow Overnight Overnight... Snow. The snow could be heavy at times. Low around 8. North wind around 11 mph, with gusts as high as 23 mph. Chance of precipitation is 100%. Total nighttime snow accumulation of 3 to 5 inches possible.

100% chance of snow Sunday Sunday... Snow, mainly before 2pm. High near 14. Northwest wind 11 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 100%. New snow accumulation of 3 to 5 inches possible.

Clearing on Sunday Night Sunday Night... Cloudy during the early evening, then gradual clearing, with a low around -5. Wind chill values as low as -20. Northwest wind 9 to 14 mph, with gusts as high as 24 mph.

Sunny on Monday Monday... Sunny and cold, with a high near 14. Wind chill values as low as -20. Northwest wind 7 to 11 mph, with gusts as high as 20 mph.

Mostly Clear on Monday Night Monday Night... Mostly clear, with a low around 2. Southwest wind 6 to 10 mph, with gusts as high as 20 mph.

Mostly Sunny on Tuesday Tuesday... Mostly sunny, with a high near 30.

Cloudy on Tuesday Night Tuesday Night... Partly cloudy, with a low around -3.

Mostly Sunny on Wednesday Wednesday... Mostly sunny, with a high near 23.

Cloudy on Wednesday Night Wednesday Night... Partly cloudy, with a low around 0.

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

Mostly Cloudy on Thursday Night Thursday Night... Mostly cloudy, with a low around 6.

Partly Sunny on Friday Friday... Partly sunny, with a high near 21.

Cloudy on Friday Night Friday Night... Partly cloudy, with a low around 3.

Mostly Sunny on Saturday Saturday... Mostly sunny and cold, with a high near 20.

Current Radar Image


Sun Almanac for Troy, Illinois
Sunrise: 07:11 AM
Sunset: 5:13 PM
Civil Sunrise:06:42 AM
Civil Sunset: 5:42 PM
Nautical Sunrise: 06:10 AM
Nautical Sunset: 6:14 PM
Astro Sunrise: 05:39 AM
Astro Sunset: 6:45 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.