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.

Partly Cloudy

77°F

25°C

Humidity 54%
Wind Speed SE 8 mph
Barometer 29.81 in
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 17 Oct 4:50 pm CDT
Extended Forecast for

Mount Olive IL

  • Tonight

    Tonight: Partly cloudy, with a low around 60. South wind around 10 mph, with gusts as high as 20 mph.

    Low: 60 °F

    Partly Cloudy

  • Saturday

    Saturday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 10am. Mostly cloudy, with a high near 74. Southwest wind 8 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 70%.

    High: 74 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm. Low around 47. Southwest wind 8 to 17 mph becoming northwest after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 100%.

    Low: 47 °F

    Showers

  • Sunday

    Sunday: A 20 percent chance of showers before 1pm. Partly sunny, then gradually becoming sunny, with a high near 62. Breezy, with a northwest wind 17 to 21 mph, with gusts as high as 28 mph.

    High: 62 °F

    Slight Chance
    Showers and
    Breezy

  • Sunday Night

    Sunday Night: Clear, with a low around 41. West wind 5 to 7 mph becoming light and variable.

    Low: 41 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 70. Breezy.

    High: 70 °F

    Sunny then
    Sunny and
    Breezy

  • Monday Night

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

    Low: 45 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 61.

    High: 61 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 36.

    Low: 36 °F

    Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 60. South wind around 10 mph, with gusts as high as 20 mph.
Saturday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 10am. Mostly cloudy, with a high near 74. Southwest wind 8 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 70%.
Saturday Night
Showers and possibly a thunderstorm. Low around 47. Southwest wind 8 to 17 mph becoming northwest after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 100%.
Sunday
A 20 percent chance of showers before 1pm. Partly sunny, then gradually becoming sunny, with a high near 62. Breezy, with a northwest wind 17 to 21 mph, with gusts as high as 28 mph.
Sunday Night
Clear, with a low around 41. West wind 5 to 7 mph becoming light and variable.
Monday
Sunny, with a high near 70. Breezy.
Monday Night
Mostly clear, with a low around 45.
Tuesday
Sunny, with a high near 61.
Tuesday Night
Clear, with a low around 36.
Wednesday
Sunny, with a high near 63.
Wednesday Night
A 20 percent chance of showers. Partly cloudy, with a low around 43.
Thursday
A 30 percent chance of showers. Mostly sunny, with a high near 67.
Thursday Night
A 20 percent chance of showers. Partly cloudy, with a low around 41.
Friday
Mostly sunny, with a high near 65.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mount Olive IL
 39.09°N 89.73°W (Elev. 676 ft)
Last Update:
4:16 pm CDT Oct 17, 2025
Forecast Valid:
5pm CDT Oct 17, 2025-6pm CDT Oct 24, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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