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

Hazardous Weather Conditions

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

82°F

28°C

Humidity 51%
Wind Speed SW 5 mph
Barometer 30.23 in
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 2 Oct 11:50 am CDT
Extended Forecast for

Troy IL

  • Today

    Today: Mostly sunny, with a high near 88. South wind 3 to 6 mph.

    High: 88 °F

    Mostly Sunny

  • Tonight

    Tonight: Isolated showers and thunderstorms before 8pm. Partly cloudy, with a low around 65. South wind 3 to 5 mph. Chance of precipitation is 20%.

    Low: 65 °F

    Isolated
    T-storms then
    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 88. Southwest wind around 6 mph.

    High: 88 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 61. South wind around 5 mph becoming calm after midnight.

    Low: 61 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 87. Light south wind increasing to 6 to 11 mph in the morning.

    High: 87 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 58.

    Low: 58 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 87.

    High: 87 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 63.

    Low: 63 °F

    Mostly Clear

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 85.

    High: 85 °F

    Sunny then
    Slight Chance
    T-storms

Detailed Forecast

Today
Mostly sunny, with a high near 88. South wind 3 to 6 mph.
Tonight
Isolated showers and thunderstorms before 8pm. Partly cloudy, with a low around 65. South wind 3 to 5 mph. Chance of precipitation is 20%.
Friday
Mostly sunny, with a high near 88. Southwest wind around 6 mph.
Friday Night
Mostly clear, with a low around 61. South wind around 5 mph becoming calm after midnight.
Saturday
Sunny, with a high near 87. Light south wind increasing to 6 to 11 mph in the morning.
Saturday Night
Clear, with a low around 58.
Sunday
Sunny, with a high near 87.
Sunday Night
Mostly clear, with a low around 63.
Monday
A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 85.
Monday Night
A 20 percent chance of showers after 1am. Partly cloudy, with a low around 62.
Tuesday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 83.
Tuesday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 59.
Wednesday
Mostly sunny, with a high near 75.
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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:
10:21 am CDT Oct 2, 2025
Forecast Valid:
11am CDT Oct 2, 2025-6pm CDT Oct 8, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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