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

52°F

11°C

Humidity 94%
Wind Speed Calm
Barometer 30.03 in
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 11 Oct 7:50 am CDT
Extended Forecast for

Grantfork IL

  • Today

    Today: Sunny, with a high near 86. Light and variable wind.

    High: 86 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 62. Light south wind.

    Low: 62 °F

    Mostly Clear

  • Columbus Day

    Columbus Day: Partly sunny, then gradually becoming sunny, with a high near 92. Light southwest wind increasing to 8 to 13 mph in the morning.

    High: 92 °F

    Becoming
    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 68. Southwest wind 7 to 9 mph.

    Low: 68 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 93. West wind 6 to 10 mph.

    High: 93 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 68.

    Low: 68 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 83. Chance of precipitation is 70%.

    High: 83 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A chance of showers, with thunderstorms also possible after 1am. Mostly cloudy, with a low around 62. Chance of precipitation is 50%.

    Low: 62 °F

    Chance
    Showers

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 78. Chance of precipitation is 70%.

    High: 78 °F

    Showers
    Likely

Detailed Forecast

Today
Sunny, with a high near 86. Light and variable wind.
Tonight
Mostly clear, with a low around 62. Light south wind.
Columbus Day
Partly sunny, then gradually becoming sunny, with a high near 92. Light southwest wind increasing to 8 to 13 mph in the morning.
Monday Night
Clear, with a low around 68. Southwest wind 7 to 9 mph.
Tuesday
Sunny, with a high near 93. West wind 6 to 10 mph.
Tuesday Night
A 40 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 68.
Wednesday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 83. Chance of precipitation is 70%.
Wednesday Night
A chance of showers, with thunderstorms also possible after 1am. Mostly cloudy, with a low around 62. Chance of precipitation is 50%.
Thursday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 78. Chance of precipitation is 70%.
Thursday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 53.
Friday
Partly sunny, with a high near 68. Breezy.
Friday Night
Partly cloudy, with a low around 41.
Saturday
Mostly sunny, with a high near 61.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Grantfork IL
 38.82°N 89.65°W (Elev. 577 ft)
Last Update:
5:26 am CDT Oct 11, 2026
Forecast Valid:
8am CDT Oct 11, 2026-6pm CDT Oct 17, 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