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

81°F

27°C

Humidity 42%
Wind Speed S 9 mph
Barometer 30.03 in
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 5 Oct 5:50 pm CDT
Extended Forecast for

Mount Olive IL

  • Tonight

    Tonight: Mostly clear, with a low around 61. South wind 6 to 9 mph.

    Low: 61 °F

    Mostly Clear

  • Monday

    Monday: Isolated showers, then scattered showers and thunderstorms after 1pm. Mostly sunny, with a high near 85. South wind 6 to 8 mph. Chance of precipitation is 30%.

    High: 85 °F

    Mostly Sunny
    then
    Scattered
    Showers

  • Monday Night

    Monday Night: Scattered showers and thunderstorms. Mostly cloudy, with a low around 64. South wind around 6 mph becoming calm after midnight. Chance of precipitation is 50%.

    Low: 64 °F

    Scattered
    Showers

  • Tuesday

    Tuesday: A chance of showers and thunderstorms before 4pm, then a slight chance of showers. Mostly cloudy, with a high near 74. Light northwest wind becoming north 6 to 11 mph in the morning. Chance of precipitation is 30%.

    High: 74 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 49. North wind 6 to 9 mph.

    Low: 49 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 72.

    High: 72 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 45.

    Low: 45 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 72.

    High: 72 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 45.

    Low: 45 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 61. South wind 6 to 9 mph.
Monday
Isolated showers, then scattered showers and thunderstorms after 1pm. Mostly sunny, with a high near 85. South wind 6 to 8 mph. Chance of precipitation is 30%.
Monday Night
Scattered showers and thunderstorms. Mostly cloudy, with a low around 64. South wind around 6 mph becoming calm after midnight. Chance of precipitation is 50%.
Tuesday
A chance of showers and thunderstorms before 4pm, then a slight chance of showers. Mostly cloudy, with a high near 74. Light northwest wind becoming north 6 to 11 mph in the morning. Chance of precipitation is 30%.
Tuesday Night
Partly cloudy, with a low around 49. North wind 6 to 9 mph.
Wednesday
Sunny, with a high near 72.
Wednesday Night
Clear, with a low around 45.
Thursday
Sunny, with a high near 72.
Thursday Night
Mostly clear, with a low around 45.
Friday
Mostly sunny, with a high near 74.
Friday Night
Mostly clear, with a low around 48.
Saturday
Sunny, with a high near 77.
Saturday Night
Mostly clear, with a low around 49.
Sunday
Sunny, with a high near 79.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mount Olive IL
 39.07°N 89.73°W (Elev. 669 ft)
Last Update:
4:16 pm CDT Oct 5, 2025
Forecast Valid:
6pm CDT Oct 5, 2025-6pm CDT Oct 12, 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