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 79%
Wind Speed S 6 mph
Barometer 30.07 in
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Wind Chill50°F (10°C)
Last update 14 Nov 3:35 am CST
Extended Forecast for

Mount Olive IL

  • Overnight

    Overnight: Mostly clear, with a low around 45. South wind around 7 mph.

    Low: 45 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 75. Southwest wind 6 to 10 mph.

    High: 75 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 57. Southwest wind 7 to 10 mph.

    Low: 57 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 76. Southwest wind 9 to 15 mph becoming west in the afternoon. Winds could gust as high as 22 mph.

    High: 76 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 40. North wind around 8 mph.

    Low: 40 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 58.

    High: 58 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 36.

    Low: 36 °F

    Mostly Clear

  • Monday

    Monday: A 30 percent chance of rain after noon. Mostly sunny, with a high near 56.

    High: 56 °F

    Mostly Sunny
    then Chance
    Rain

  • Monday Night

    Monday Night: Rain likely. Mostly cloudy, with a low around 41. Chance of precipitation is 70%.

    Low: 41 °F

    Rain Likely

Detailed Forecast

Overnight
Mostly clear, with a low around 45. South wind around 7 mph.
Friday
Sunny, with a high near 75. Southwest wind 6 to 10 mph.
Friday Night
Partly cloudy, with a low around 57. Southwest wind 7 to 10 mph.
Saturday
Partly sunny, with a high near 76. Southwest wind 9 to 15 mph becoming west in the afternoon. Winds could gust as high as 22 mph.
Saturday Night
Mostly clear, with a low around 40. North wind around 8 mph.
Sunday
Sunny, with a high near 58.
Sunday Night
Mostly clear, with a low around 36.
Monday
A 30 percent chance of rain after noon. Mostly sunny, with a high near 56.
Monday Night
Rain likely. Mostly cloudy, with a low around 41. Chance of precipitation is 70%.
Tuesday
A 20 percent chance of rain before noon. Partly sunny, with a high near 53.
Tuesday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 34.
Wednesday
A 30 percent chance of rain. Partly sunny, with a high near 52.
Wednesday Night
Rain likely. Mostly cloudy, with a low around 40. Chance of precipitation is 60%.
Thursday
Rain likely. Mostly cloudy, with a high near 55. Chance of precipitation is 70%.
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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:
3:16 am CST Nov 14, 2025
Forecast Valid:
3am CST Nov 14, 2025-6pm CST Nov 20, 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