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.

Overcast

46°F

8°C

Humidity 82%
Wind Speed W 13 mph
Barometer 30.02 in
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Wind Chill40°F (4°C)
Last update 7 Mar 4:50 pm CST
Extended Forecast for

Mount Olive IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 35. West wind 5 to 13 mph, with gusts as high as 20 mph.

    Low: 35 °F

    Mostly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 63. Southwest wind 6 to 13 mph, with gusts as high as 20 mph.

    High: 63 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 42. South wind 8 to 10 mph, with gusts as high as 20 mph.

    Low: 42 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 74. South wind 9 to 15 mph, with gusts as high as 22 mph.

    High: 74 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 58. South wind 8 to 11 mph, with gusts as high as 20 mph.

    Low: 58 °F

    Mostly Clear

  • Tuesday

    Tuesday: A slight chance of showers, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 78. Chance of precipitation is 50%.

    High: 78 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm. Low around 51. Breezy. Chance of precipitation is 90%.

    Low: 51 °F

    Showers and
    Breezy

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm before noon, then showers likely. High near 64. Breezy. Chance of precipitation is 100%.

    High: 64 °F

    Breezy.
    Showers then
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers before midnight. Partly cloudy, with a low around 30.

    Low: 30 °F

    Slight Chance
    Showers then
    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 35. West wind 5 to 13 mph, with gusts as high as 20 mph.
Sunday
Sunny, with a high near 63. Southwest wind 6 to 13 mph, with gusts as high as 20 mph.
Sunday Night
Clear, with a low around 42. South wind 8 to 10 mph, with gusts as high as 20 mph.
Monday
Sunny, with a high near 74. South wind 9 to 15 mph, with gusts as high as 22 mph.
Monday Night
Mostly clear, with a low around 58. South wind 8 to 11 mph, with gusts as high as 20 mph.
Tuesday
A slight chance of showers, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 78. Chance of precipitation is 50%.
Tuesday Night
Showers and possibly a thunderstorm. Low around 51. Breezy. Chance of precipitation is 90%.
Wednesday
Showers and possibly a thunderstorm before noon, then showers likely. High near 64. Breezy. Chance of precipitation is 100%.
Wednesday Night
A 20 percent chance of showers before midnight. Partly cloudy, with a low around 30.
Thursday
Sunny, with a high near 50.
Thursday Night
Mostly cloudy, with a low around 39.
Friday
Partly sunny, with a high near 63. Breezy.
Friday Night
Mostly cloudy, with a low around 36.
Saturday
Mostly cloudy, with a high near 53.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mount Olive IL
 39.07°N 89.73°W (Elev. 669 ft)
Last Update:
5:01 pm CST Mar 7, 2026
Forecast Valid:
5pm CST Mar 7, 2026-6pm CDT Mar 14, 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