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

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

66°F

19°C

Humidity 79%
Wind Speed NA
Barometer 29.76 in
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 18 Oct 5:15 am CDT
Extended Forecast for

Grantfork IL

  • Today

    Today: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after noon. High near 76. South wind 7 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.

    High: 76 °F

    Chance
    T-storms then
    Showers

  • Tonight

    Tonight: Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 49. Breezy, with a south wind 8 to 13 mph becoming northwest 15 to 20 mph after midnight. Winds could gust as high as 31 mph. Chance of precipitation is 100%.

    Low: 49 °F

    Heavy Rain
    then Heavy
    Rain and
    Breezy

  • Sunday

    Sunday: A 20 percent chance of showers before 1pm. Cloudy through mid morning, then gradual clearing, with a high near 63. Breezy, with a northwest wind 18 to 22 mph, with gusts as high as 31 mph.

    High: 63 °F

    Slight Chance
    Showers and
    Breezy

  • Sunday Night

    Sunday Night: Clear, with a low around 41. West wind 5 to 9 mph becoming light and variable.

    Low: 41 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 71. Breezy, with a south wind 6 to 11 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 29 mph.

    High: 71 °F

    Sunny then
    Sunny and
    Breezy

  • Monday Night

    Monday Night: Mostly clear, with a low around 47.

    Low: 47 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 63. Breezy.

    High: 63 °F

    Sunny then
    Sunny and
    Breezy

  • Tuesday Night

    Tuesday Night: Clear, with a low around 37.

    Low: 37 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 65.

    High: 65 °F

    Sunny

Detailed Forecast

Today
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after noon. High near 76. South wind 7 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.
Tonight
Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 49. Breezy, with a south wind 8 to 13 mph becoming northwest 15 to 20 mph after midnight. Winds could gust as high as 31 mph. Chance of precipitation is 100%.
Sunday
A 20 percent chance of showers before 1pm. Cloudy through mid morning, then gradual clearing, with a high near 63. Breezy, with a northwest wind 18 to 22 mph, with gusts as high as 31 mph.
Sunday Night
Clear, with a low around 41. West wind 5 to 9 mph becoming light and variable.
Monday
Sunny, with a high near 71. Breezy, with a south wind 6 to 11 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 29 mph.
Monday Night
Mostly clear, with a low around 47.
Tuesday
Sunny, with a high near 63. Breezy.
Tuesday Night
Clear, with a low around 37.
Wednesday
Sunny, with a high near 65.
Wednesday Night
Mostly clear, with a low around 42.
Thursday
Mostly sunny, with a high near 70.
Thursday Night
A 30 percent chance of showers. Partly cloudy, with a low around 46.
Friday
A 20 percent chance of showers. Mostly sunny, with a high near 68.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Grantfork IL
 38.82°N 89.65°W (Elev. 577 ft)
Last Update:
4:46 am CDT Oct 18, 2025
Forecast Valid:
5am CDT Oct 18, 2025-6pm CDT Oct 24, 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