Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

77°F

25°C

Humidity 32%
Wind Speed S 5 mph
Barometer 30.01 in
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 6 Oct 3:50 pm CDT
Extended Forecast for

Mount Olive IL

  • Tonight

    Tonight: Clear, with a low around 53. Calm wind becoming south around 5 mph after midnight.

    Low: 53 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 87. Southwest wind 5 to 9 mph.

    High: 87 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 54. Light and variable wind.

    Low: 54 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 81. Calm wind becoming north around 6 mph in the afternoon.

    High: 81 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 52. Light northeast wind.

    Low: 52 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 84.

    High: 84 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 55.

    Low: 55 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 89.

    High: 89 °F

    Sunny

  • Saturday Night

    Saturday Night: A 30 percent chance of showers after 1am.  Partly cloudy, with a low around 58.

    Low: 58 °F

    Partly Cloudy
    then Chance
    Showers

Detailed Forecast

Tonight
Clear, with a low around 53. Calm wind becoming south around 5 mph after midnight.
Wednesday
Sunny, with a high near 87. Southwest wind 5 to 9 mph.
Wednesday Night
Mostly clear, with a low around 54. Light and variable wind.
Thursday
Sunny, with a high near 81. Calm wind becoming north around 6 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 52. Light northeast wind.
Friday
Sunny, with a high near 84.
Friday Night
Clear, with a low around 55.
Saturday
Sunny, with a high near 89.
Saturday Night
A 30 percent chance of showers after 1am. Partly cloudy, with a low around 58.
Sunday
A 30 percent chance of showers before 1pm. Mostly sunny, with a high near 78.
Sunday Night
Partly cloudy, with a low around 56.
Columbus Day
Mostly sunny, with a high near 83.
Monday Night
A 20 percent chance of showers. Mostly clear, with a low around 57.
Tuesday
A 30 percent chance of showers. Mostly sunny, with a high near 80.
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ABOUT THIS FORECAST

 
Point Forecast:
Mount Olive IL
 39.07°N 89.73°W (Elev. 669 ft)
2:51 pm CDT Oct 6, 2026
4pm CDT Oct 6, 2026-6pm CDT Oct 13, 2026
 
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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