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

75°F

24°C

Humidity 96%
Wind Speed Calm
Barometer 30.15 in
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Last update 25 Jun 3:15 am CDT
Extended Forecast for

Troy IL

Heat Advisory June 25, 03:27am until June 26, 09:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory June 25, 03:27am until June 26, 09:00pm

    NOW until 9:00pm Thu

    Heat Advisory

  • Overnight

    Low: 76 °F

    Clear

  • Wednesday

    Wednesday: Scattered showers and thunderstorms, mainly after 5pm. Mostly sunny, with a high near 95. Heat index values as high as 103. South wind 3 to 8 mph. Chance of precipitation is 30%.

    High: 95 °F

    Sunny then
    Scattered
    T-storms

  • Wednesday Night

    Wednesday Night: Isolated showers and thunderstorms before 9pm. Partly cloudy, with a low around 75. South wind 3 to 6 mph. Chance of precipitation is 20%.

    Low: 75 °F

    Isolated
    T-storms then
    Mostly Clear

  • Thursday

    Thursday: Isolated showers and thunderstorms after 4pm. Sunny, with a high near 95. Heat index values as high as 104. Southwest wind 5 to 9 mph. Chance of precipitation is 20%.

    High: 95 °F

    Sunny then
    Isolated
    T-storms

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 76. South wind 3 to 6 mph.

    Low: 76 °F

    Partly Cloudy

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 92.

    High: 92 °F

    Mostly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 74.

    Low: 74 °F

    Chance
    T-storms then
    Chance
    Showers

  • Saturday

    Saturday: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93.

    High: 93 °F

    Chance
    T-storms

Detailed Forecast

Overnight
Clear, with a low around 76. Calm wind.
Wednesday
Scattered showers and thunderstorms, mainly after 5pm. Mostly sunny, with a high near 95. Heat index values as high as 103. South wind 3 to 8 mph. Chance of precipitation is 30%.
Wednesday Night
Isolated showers and thunderstorms before 9pm. Partly cloudy, with a low around 75. South wind 3 to 6 mph. Chance of precipitation is 20%.
Thursday
Isolated showers and thunderstorms after 4pm. Sunny, with a high near 95. Heat index values as high as 104. Southwest wind 5 to 9 mph. Chance of precipitation is 20%.
Thursday Night
Partly cloudy, with a low around 76. South wind 3 to 6 mph.
Friday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 92.
Friday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 74.
Saturday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93.
Saturday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 74.
Sunday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 94.
Sunday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 74.
Monday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 90.
Monday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71.
Tuesday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 87.
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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:
3:21 am CDT Jun 25, 2025
Forecast Valid:
3am CDT Jun 25, 2025-6pm CDT Jul 1, 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