Troy, Illinois Weather
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Weather Forecast for Troy, Illinois : Madison County
Issued: 10:21 am CDT Sep 18, 2025 Latitude: 38.7292147 Longitude: -89.8831541 View on Google Maps

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Today Tonight Friday Saturday Sunday Monday Tuesday Wednesday
Sunny on Today 20% chance of thunderstorms on Tonight 20% chance of thunderstorms on Friday 20% chance of thunderstorms on Saturday 50% chance of thunderstorms on Sunday 50% chance of thunderstorms on Monday 30% chance of thunderstorms on Tuesday 30% chance of thunderstorms on Wednesday
High: 94°F Low: 65°F High: 85°F High: 88°F High: 84°F High: 82°F High: 81°F High: 81°F
Low: 64°F Low: 66°F Low: 66°F Low: 65°F Low: 61°F  
Sunny Thunderstorms Thunderstorms Thunderstorms Thunderstorms Thunderstorms Thunderstorms Thunderstorms
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Current Conditions at
SCOTT AFB - (KBLV)
86°
Clear
as of 10:55 AM CDST
Rel. Humidity: 42%
Dew Point: 61°F
Visibility: 10 Miles
Pressure: 30.02 in.
Flight Rule: VFR
Wind Data
3 MPH
200° South
Cloud Level(s): Clear
Current Conditions at
ALTON - (KALN)
84°
Clear
as of 10:50 AM CDST
Rel. Humidity: 45%
Dew Point: 61°F
Visibility: 10 Miles
Pressure: 30.05 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
EAST ST LOUIS - (KCPS)
88°
Clear
as of 10:53 AM CDST
Rel. Humidity: 40%
Dew Point: 61°F
Visibility: 10 Miles
Pressure: 30.03 in.
Flight Rule: VFR
Wind Data
5 MPH
120° Southeast
Cloud Level(s): Clear
Current Conditions at
ST LOUIS - (KSTL)
88°
Mostly Cloudy
as of 10:51 AM CDST
Rel. Humidity: 38%
Dew Point: 59°F
Visibility: 10 Miles
Pressure: 30.04 in.
Flight Rule: VFR
Wind Data
7 MPH
150° Southeast
Cloud Level(s): Few at 20000ft, Broken at 25000ft
Sunny on Today Today... Sunny, with a high near 94. Light east wind.
20% chance of thunderstorms Tonight Tonight... Isolated showers and thunderstorms between 3am and 4am, then isolated showers after 4am. Partly cloudy, with a low around 65. East wind around 6 mph becoming light and variable after midnight. Chance of precipitation is 20%.
20% chance of thunderstorms Friday Friday... Isolated showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 85. North wind around 6 mph becoming west in the afternoon. Chance of precipitation is 20%.
30% chance of thunderstorms Friday Night Friday Night... Scattered showers and thunderstorms. Partly cloudy, with a low around 64. Light and variable wind. Chance of precipitation is 30%.
20% chance of thunderstorms Saturday Saturday... A slight chance of showers, with thunderstorms also possible after 4pm. Mostly sunny, with a high near 88. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 20%.
30% chance of thunderstorms Saturday Night Saturday Night... A 30 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 66.
50% chance of thunderstorms Sunday Sunday... A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 84. Chance of precipitation is 50%.
60% chance of thunderstorms Sunday Night Sunday Night... Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 66. Chance of precipitation is 60%.
50% chance of thunderstorms Monday Monday... A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 82.
50% chance of thunderstorms Monday Night Monday Night... A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65.
30% chance of thunderstorms Tuesday Tuesday... A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 81.
30% chance of thunderstorms Tuesday Night Tuesday Night... A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 61.
30% chance of thunderstorms Wednesday Wednesday... A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 81.
Current Radar Image


Sun Almanac for Troy, Illinois
Sunrise: 06:44 AM
Sunset: 7:03 PM
Civil Sunrise:06:18 AM
Civil Sunset: 7:29 PM
Nautical Sunrise: 05:46 AM
Nautical Sunset: 8:01 PM
Astro Sunrise: 05:15 AM
Astro Sunset: 8:32 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.