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Troy, Illinois Weather Forecast
Troy, Illinois Weather
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Weather Forecast for Troy, Illinois : Madison County
Issued: 9:41 am CST Dec 27, 2025 Latitude: 38.7292147 Longitude: -89.8831541 View on Google Maps

MouseOver for Detail Forecast
Today Tonight Sunday Monday Tuesday Wednesday New Year's Day Friday
Morning Fog on Today 20% chance of rain on Tonight 80% chance of thunderstorms on Sunday Mostly Sunny on Monday Sunny on Tuesday Mostly Sunny on Wednesday Mostly Sunny on New Year's Day Mostly Sunny on Friday
High: 60°F Low: 58°F High: 71°F High: 27°F High: 33°F High: 42°F High: 33°F High: 32°F
Low: 19°F Low: 18°F Low: 25°F Low: 23°F Low: 15°F  
Morning Fog Rain Thunderstorms Mostly Sunny Sunny Mostly Sunny Mostly Sunny Mostly Sunny
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Current Conditions at
SCOTT AFB - (KBLV)
50°
Feels like 46°F
Cloudy
Fog
as of 10:28 AM CST
Rel. Humidity: 100%
Dew Point: 50°F
Visibility: 1/2 Miles
Pressure: 29.95 in.
Flight Rule: IFR
Wind Data
9 MPH
130° Southeast
Current Conditions at
ALTON - (KALN)
46°
Feels like 41°F
Cloudy
Mist
as of 9:45 AM CST
Rel. Humidity: 100%
Dew Point: 46°F
Visibility: 3/4 Miles
Pressure: 29.98 in.
Flight Rule: LIFR
Wind Data
10 MPH
120° Southeast
Cloud Level(s): Solid Overcast at 300ft
Current Conditions at
EAST ST LOUIS - (KCPS)
48°
Cloudy
Mist
as of 10:34 AM CST
Rel. Humidity: 100%
Dew Point: 48°F
Visibility: 3/4 Miles
Pressure: 29.95 in.
Flight Rule: LIFR
Wind Data
6 MPH
130° Southeast
Cloud Level(s): Solid Overcast at 200ft
Current Conditions at
ST LOUIS - (KSTL)
48°
Feels like 42°F
Cloudy
Light Drizzle Fog
as of 9:58 AM CST
Rel. Humidity: 100%
Dew Point: 48°F
Visibility: 1/2 Miles
Pressure: 29.96 in.
Flight Rule: LIFR
Wind Data
14 MPH
150° Southeast
Cloud Level(s): Solid Overcast at 200ft
Morning Fog on Today Today... Patchy dense fog before 11am. Otherwise, cloudy, with a high near 60. Southeast wind 9 to 11 mph.
20% chance of rain Tonight Tonight... A 20 percent chance of showers after 9pm. Cloudy, with a low around 58. South wind around 10 mph.
80% chance of thunderstorms Sunday Sunday... Showers and thunderstorms likely, then showers and possibly a thunderstorm after 3pm. High near 71. Breezy, with a south wind 10 to 20 mph becoming west in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 80%.
50% chance of rain Sunday Night Sunday Night... A 50 percent chance of showers before 9pm. Cloudy, then gradually becoming partly cloudy, with a low around 19. Breezy, with a west wind 21 to 25 mph, with gusts as high as 34 mph.
Mostly Sunny on Monday Monday... Mostly sunny, with a high near 27. Breezy, with a northwest wind 18 to 25 mph, with gusts as high as 34 mph.
Cloudy on Monday Night Monday Night... Partly cloudy, with a low around 18.
Sunny on Tuesday Tuesday... Sunny, with a high near 33.
Mostly Clear on Tuesday Night Tuesday Night... Mostly clear, with a low around 25.
Mostly Sunny on Wednesday Wednesday... Mostly sunny, with a high near 42.
Mostly Cloudy on Wednesday Night Wednesday Night... Mostly cloudy, with a low around 23.
Mostly Sunny on New Year's Day New Year's Day... Mostly sunny, with a high near 33.
Cloudy on Thursday Night Thursday Night... Partly cloudy, with a low around 15.
Mostly Sunny on Friday Friday... Mostly sunny, with a high near 32.
Current Radar Image


Sun Almanac for Troy, Illinois
Sunrise: 07:17 AM
Sunset: 4:45 PM
Civil Sunrise:06:47 AM
Civil Sunset: 5:15 PM
Nautical Sunrise: 06:13 AM
Nautical Sunset: 5:48 PM
Astro Sunrise: 05:41 AM
Astro Sunset: 6:21 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.