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 94%
Wind Speed Vrbl 3 mph
Barometer 29.87 in
Dewpoint 81°F (27°C)
Visibility 10.00 mi
Heat Index93°F (34°C)
Last update 26 Jul 8:50 pm CDT
Extended Forecast for

3 Miles SSW Grantfork IL

Extreme Heat Warning July 26, 09:12pm until July 27, 09:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning July 26, 09:12pm until July 27, 09:00pm

    NOW until 9:00pm Mon

    Extreme Heat Warning

  • Tonight

    Low: 76 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 94. Heat index values as high as 112. Calm wind becoming south 5 to 9 mph in the morning.

    High: 94 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 78. South wind around 6 mph becoming west after midnight.

    Low: 78 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 89. Heat index values as high as 100. North wind 6 to 10 mph.

    High: 89 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 68. North wind 5 to 9 mph becoming light in the evening.

    Low: 68 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 85.

    High: 85 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 66.

    Low: 66 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 86.

    High: 86 °F

    Sunny

Detailed Forecast

Tonight
Partly cloudy, with a low around 76. Light and variable wind.
Monday
Sunny, with a high near 94. Heat index values as high as 112. Calm wind becoming south 5 to 9 mph in the morning.
Monday Night
Mostly clear, with a low around 78. South wind around 6 mph becoming west after midnight.
Tuesday
Sunny, with a high near 89. Heat index values as high as 100. North wind 6 to 10 mph.
Tuesday Night
Mostly clear, with a low around 68. North wind 5 to 9 mph becoming light in the evening.
Wednesday
Sunny, with a high near 85.
Wednesday Night
Mostly clear, with a low around 66.
Thursday
Sunny, with a high near 86.
Thursday Night
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 68.
Friday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 82. Chance of precipitation is 40%.
Friday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 68.
Saturday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 82.
Saturday Night
Mostly clear, with a low around 68.
Sunday
Sunny, with a high near 84.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSW Grantfork IL
 38.8°N 89.68°W (Elev. 499 ft)
Last Update:
8:41 pm CDT Jul 26, 2026
Forecast Valid:
9pm CDT Jul 26, 2026-6pm CDT Aug 2, 2026
 
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