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.

Partly Cloudy

93°F

34°C

Humidity 50%
Wind Speed S 15 G 26 mph
Barometer 29.93 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index101°F (38°C)
Last update 21 Jun 3:50 pm CDT
Extended Forecast for

5 Miles WNW Carlinville IL

Heat Advisory June 21, 04:25pm until June 24, 09:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory June 21, 04:25pm until June 24, 09:00pm

    NOW until 9:00pm Tue

    Heat Advisory

  • Tonight

    Low: 74 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 94. Heat index values as high as 100. Southwest wind 9 to 14 mph, with gusts as high as 21 mph.

    High: 94 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 73. South wind 8 to 10 mph.

    Low: 73 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 93. South wind 7 to 9 mph.

    High: 93 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 73. South wind 6 to 8 mph.

    Low: 73 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93.

    High: 93 °F

    Slight Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 72.

    Low: 72 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 91.

    High: 91 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

Detailed Forecast

Tonight
Clear, with a low around 74. South wind 8 to 14 mph, with gusts as high as 23 mph.
Sunday
Sunny, with a high near 94. Heat index values as high as 100. Southwest wind 9 to 14 mph, with gusts as high as 21 mph.
Sunday Night
Mostly clear, with a low around 73. South wind 8 to 10 mph.
Monday
Sunny, with a high near 93. South wind 7 to 9 mph.
Monday Night
Partly cloudy, with a low around 73. South wind 6 to 8 mph.
Tuesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93.
Tuesday Night
Partly cloudy, with a low around 72.
Wednesday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 91.
Wednesday Night
Partly cloudy, with a low around 73.
Thursday
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Sunny, with a high near 91.
Thursday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.
Friday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89.
Friday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.
Saturday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 88.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles WNW Carlinville IL
 39.32°N 89.94°W (Elev. 627 ft)
Last Update:
2:21 pm CDT Jun 21, 2025
Forecast Valid:
4pm CDT Jun 21, 2025-6pm CDT Jun 28, 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