National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Overcast with Haze

63°F

17°C

Humidity 86%
Wind Speed NW 20 G 29 mph
Barometer 29.99 in
Dewpoint 58°F (14°C)
Visibility 5.00 mi
Last update 15 Oct 10:55 pm CDT
Extended Forecast for

Troy IL

  • Tonight

    Tonight: Scattered showers, mainly before midnight. Increasing clouds, with a low around 49. Northwest wind 10 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 40%.

    Low: 49 °F

    Scattered
    Showers

  • Friday

    Friday: Isolated showers after 2pm. Mostly cloudy, with a high near 56. Breezy, with a northwest wind 18 to 22 mph, with gusts as high as 32 mph. Chance of precipitation is 20%.

    High: 56 °F

    Breezy.
    Partly Sunny
    then Isolated
    Showers

  • Friday Night

    Friday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 38. Breezy, with a north wind 10 to 20 mph, with gusts as high as 28 mph.

    Low: 38 °F

    Mostly Cloudy
    and Breezy
    then Mostly
    Clear

  • Saturday

    Saturday: Sunny, with a high near 60. North wind 5 to 7 mph becoming calm in the afternoon.

    High: 60 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 36. Calm wind.

    Low: 36 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 67.

    High: 67 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 39.

    Low: 39 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 71.

    High: 71 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 44.

    Low: 44 °F

    Partly Cloudy

Detailed Forecast

Tonight
Scattered showers, mainly before midnight. Increasing clouds, with a low around 49. Northwest wind 10 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 40%.
Friday
Isolated showers after 2pm. Mostly cloudy, with a high near 56. Breezy, with a northwest wind 18 to 22 mph, with gusts as high as 32 mph. Chance of precipitation is 20%.
Friday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 38. Breezy, with a north wind 10 to 20 mph, with gusts as high as 28 mph.
Saturday
Sunny, with a high near 60. North wind 5 to 7 mph becoming calm in the afternoon.
Saturday Night
Clear, with a low around 36. Calm wind.
Sunday
Sunny, with a high near 67.
Sunday Night
Mostly clear, with a low around 39.
Monday
Mostly sunny, with a high near 71.
Monday Night
Partly cloudy, with a low around 44.
Tuesday
Mostly sunny, with a high near 77.
Tuesday Night
Mostly clear, with a low around 47.
Wednesday
Sunny, with a high near 79.
Wednesday Night
Mostly clear, with a low around 49.
Thursday
Sunny, with a high near 81.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Troy IL
 38.72°N 89.89°W (Elev. 551 ft)
Last Update:
10:26 pm CDT Oct 15, 2026
Forecast Valid:
11pm CDT Oct 15, 2026-6pm CDT Oct 22, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation