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Troy, Illinois Weather Forecast
Troy, Illinois Weather
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Click for Dense Fog Advisory for Troy, Illinois
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Weather Forecast for Troy, Illinois : Madison County
Issued: 1:06 am CST Dec 27, 2025 Latitude: 38.7292147 Longitude: -89.8831541 View on Google Maps

MouseOver for Detail Forecast
Overnight Saturday Sunday Monday Tuesday Wednesday New Year's Day Friday
Patchy Fog on Overnight Morning Fog on Saturday 90% chance of thunderstorms on Sunday Mostly Sunny on Monday Sunny on Tuesday Partly Sunny on Wednesday Partly Sunny on New Year's Day Partly Sunny on Friday
Low: 44°F High: 62°F High: 71°F High: 26°F High: 34°F High: 41°F High: 29°F High: 30°F
Low: 59°F Low: 21°F Low: 19°F Low: 27°F Low: 19°F Low: 15°F  
Patchy Fog Morning Fog Thunderstorms Mostly Sunny Sunny Partly Sunny Partly Sunny Partly Sunny
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Current Conditions at
SCOTT AFB - (KBLV)
48°
Cloudy
Mist
as of 1:55 AM CST
Rel. Humidity: 100%
Dew Point: 48°F
Visibility: 6 Miles
Pressure: 29.93 in.
Flight Rule: LIFR
Wind Data
5 MPH
060° Northeast
Cloud Level(s): Solid Overcast at 400ft
Current Conditions at
ALTON - (KALN)
46°
Cloudy
Mist
as of 2:15 AM CST
Rel. Humidity: 93%
Dew Point: 45°F
Visibility: 5 Miles
Pressure: 29.97 in.
Flight Rule: IFR
Wind Data
5 MPH
110° East
Cloud Level(s): Solid Overcast at 500ft
Current Conditions at
EAST ST LOUIS - (KCPS)
46°
Cloudy
Mist
as of 1:53 AM CST
Rel. Humidity: 100%
Dew Point: 46°F
Visibility: 4 Miles
Pressure: 29.95 in.
Flight Rule: LIFR
Wind Data
5 MPH
110° East
Cloud Level(s): Solid Overcast at 300ft
Current Conditions at
ST LOUIS - (KSTL)
46°
Cloudy
Mist
as of 2:34 AM CST
Rel. Humidity: 100%
Dew Point: 46°F
Visibility: 3/4 Miles
Pressure: 29.95 in.
Flight Rule: LIFR
Wind Data
8 MPH
110° East
Cloud Level(s): Solid Overcast at 200ft
Patchy Fog on Overnight Overnight... Patchy fog. Otherwise, mostly cloudy, with a low around 44. Calm wind becoming east around 5 mph.
Morning Fog on Saturday Saturday... Areas of fog before 10am. Otherwise, mostly cloudy, with a high near 62. Southeast wind 6 to 11 mph.
20% chance of rain Saturday Night Saturday Night... A 20 percent chance of rain after midnight. Cloudy, with a low around 59. South wind around 11 mph.
90% chance of thunderstorms Sunday Sunday... A chance of rain and thunderstorms, then rain and possibly a thunderstorm after noon. High near 71. South wind 10 to 18 mph becoming west in the afternoon. Winds could gust as high as 26 mph. Chance of precipitation is 90%.
60% chance of rain Sunday Night Sunday Night... Rain likely before 9pm. Mostly cloudy, with a low around 21. Blustery, with a northwest wind 18 to 25 mph, with gusts as high as 33 mph. Chance of precipitation is 60%.
Mostly Sunny on Monday Monday... Mostly sunny, with a high near 26. Blustery.
Mostly Clear on Monday Night Monday Night... Mostly clear, with a low around 19.
Sunny on Tuesday Tuesday... Sunny, with a high near 34.
Cloudy on Tuesday Night Tuesday Night... Partly cloudy, with a low around 27.
Partly Sunny on Wednesday Wednesday... Partly sunny, with a high near 41.
Mostly Cloudy on Wednesday Night Wednesday Night... Mostly cloudy, with a low around 19.
Partly Sunny on New Year's Day New Year's Day... Partly sunny, with a high near 29.
Cloudy on Thursday Night Thursday Night... Partly cloudy, with a low around 15.
Partly Sunny on Friday Friday... Partly sunny, with a high near 30.
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.