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

70°F

21°C

Humidity 40%
Wind Speed NE 7 mph
Barometer 29.89 in
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 20 Mar 9:50 pm CDT
Extended Forecast for

New Douglas IL

  • Tonight

    Tonight: Partly cloudy, with a low around 49. North wind around 6 mph becoming east after midnight.

    Low: 49 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 83. East wind 6 to 8 mph becoming southwest in the afternoon.

    High: 83 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 60. South wind 7 to 9 mph.

    Low: 60 °F

    Clear

  • Sunday

    Sunday: Increasing clouds, with a high near 83. South wind 9 to 15 mph becoming northwest in the afternoon.

    High: 83 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 37. Breezy, with a north wind 14 to 20 mph.

    Low: 37 °F

    Mostly Cloudy
    and Breezy
    then Partly
    Cloudy

  • Monday

    Monday: Sunny, with a high near 55.

    High: 55 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 38.

    Low: 38 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 58.

    High: 58 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of rain and thunderstorms after 1am. Mostly cloudy, with a low around 42.

    Low: 42 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

Detailed Forecast

Tonight
Partly cloudy, with a low around 49. North wind around 6 mph becoming east after midnight.
Saturday
Sunny, with a high near 83. East wind 6 to 8 mph becoming southwest in the afternoon.
Saturday Night
Clear, with a low around 60. South wind 7 to 9 mph.
Sunday
Increasing clouds, with a high near 83. South wind 9 to 15 mph becoming northwest in the afternoon.
Sunday Night
Partly cloudy, with a low around 37. Breezy, with a north wind 14 to 20 mph.
Monday
Sunny, with a high near 55.
Monday Night
Partly cloudy, with a low around 38.
Tuesday
Partly sunny, with a high near 58.
Tuesday Night
A 20 percent chance of rain and thunderstorms after 1am. Mostly cloudy, with a low around 42.
Wednesday
Mostly cloudy, with a high near 64.
Wednesday Night
Mostly cloudy, with a low around 49.
Thursday
A 20 percent chance of rain. Sunny, with a high near 76.
Thursday Night
A 40 percent chance of rain. Partly cloudy, with a low around 39.
Friday
A 20 percent chance of rain. Partly sunny, with a high near 50.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
New Douglas IL
 38.98°N 89.67°W (Elev. 620 ft)
Last Update:
7:31 pm CDT Mar 20, 2026
Forecast Valid:
9pm CDT Mar 20, 2026-6pm CDT Mar 27, 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