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

84°F

29°C

Humidity 51%
Wind Speed SW 8 mph
Barometer 30.03 in
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Heat Index85°F (29°C)
Last update 20 Jun 11:50 am CDT
Extended Forecast for

Troy IL

Extreme Heat Watch June 21, 12:00pm until June 24, 09:00pm
Click here for hazard details and duration
Extreme Heat Watch

  • This Afternoon

    This Afternoon: Mostly cloudy early, then gradual clearing, with a high near 90. South wind 9 to 13 mph.

    High: 90 °F

    Becoming
    Sunny

  • Tonight

    Tonight: Clear, with a low around 75. South wind 8 to 11 mph, with gusts as high as 21 mph.

    Low: 75 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 95. Heat index values as high as 105. Southwest wind 10 to 17 mph, with gusts as high as 25 mph.

    High: 95 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 74. South wind 7 to 13 mph, with gusts as high as 22 mph.

    Low: 74 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 95. South wind 7 to 11 mph.

    High: 95 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 76.

    Low: 76 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 94.

    High: 94 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 76.

    Low: 76 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of showers before 1pm. Sunny, with a high near 94.

    High: 94 °F

    Slight Chance
    Showers

Detailed Forecast

This Afternoon
Mostly cloudy early, then gradual clearing, with a high near 90. South wind 9 to 13 mph.
Tonight
Clear, with a low around 75. South wind 8 to 11 mph, with gusts as high as 21 mph.
Saturday
Sunny, with a high near 95. Heat index values as high as 105. Southwest wind 10 to 17 mph, with gusts as high as 25 mph.
Saturday Night
Mostly clear, with a low around 74. South wind 7 to 13 mph, with gusts as high as 22 mph.
Sunday
Sunny, with a high near 95. South wind 7 to 11 mph.
Sunday Night
Mostly clear, with a low around 76.
Monday
Sunny, with a high near 94.
Monday Night
Partly cloudy, with a low around 76.
Tuesday
A 20 percent chance of showers before 1pm. Sunny, with a high near 94.
Tuesday Night
Mostly clear, with a low around 76.
Wednesday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 93.
Wednesday Night
Partly cloudy, with a low around 75.
Thursday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Troy IL
 38.74°N 89.89°W (Elev. 551 ft)
Last Update:
11:37 am CDT Jun 20, 2025
Forecast Valid:
12pm CDT Jun 20, 2025-6pm CDT Jun 26, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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