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

66°F

19°C

Humidity 78%
Wind Speed S 14 mph
Barometer 29.81 in
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 9 Mar 9:50 pm CDT
Extended Forecast for

New Douglas IL

  • Tonight

    Tonight: Partly cloudy, with a low around 59. South wind 10 to 15 mph, with gusts as high as 23 mph.

    Low: 59 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 79. South wind 9 to 17 mph, with gusts as high as 24 mph.

    High: 79 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Rain and thunderstorms likely, then rain and possibly a thunderstorm after 4am. Low around 54. South wind 14 to 16 mph, with gusts as high as 29 mph. Chance of precipitation is 80%.

    Low: 54 °F

    Slight Chance
    T-storms then
    T-storms

  • Wednesday

    Wednesday: Rain and possibly a thunderstorm before 10am, then showers, mainly after 10am. Temperature rising to near 63 by 10am, then falling to around 47 during the remainder of the day. Breezy, with a southwest wind 15 to 22 mph becoming northwest in the afternoon. Chance of precipitation is 90%.

    High: 63 °F⇓

    Showers and
    Breezy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 30. Northwest wind 13 to 18 mph decreasing to 7 to 12 mph after midnight. Winds could gust as high as 25 mph.

    Low: 30 °F

    Mostly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 51.

    High: 51 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 42.

    Low: 42 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 59.

    High: 59 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 38.

    Low: 38 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 59. South wind 10 to 15 mph, with gusts as high as 23 mph.
Tuesday
Partly sunny, with a high near 79. South wind 9 to 17 mph, with gusts as high as 24 mph.
Tuesday Night
Rain and thunderstorms likely, then rain and possibly a thunderstorm after 4am. Low around 54. South wind 14 to 16 mph, with gusts as high as 29 mph. Chance of precipitation is 80%.
Wednesday
Rain and possibly a thunderstorm before 10am, then showers, mainly after 10am. Temperature rising to near 63 by 10am, then falling to around 47 during the remainder of the day. Breezy, with a southwest wind 15 to 22 mph becoming northwest in the afternoon. Chance of precipitation is 90%.
Wednesday Night
Mostly cloudy, with a low around 30. Northwest wind 13 to 18 mph decreasing to 7 to 12 mph after midnight. Winds could gust as high as 25 mph.
Thursday
Sunny, with a high near 51.
Thursday Night
Mostly cloudy, with a low around 42.
Friday
Mostly cloudy, with a high near 59.
Friday Night
Mostly cloudy, with a low around 38.
Saturday
Mostly sunny, with a high near 65.
Saturday Night
A 20 percent chance of rain. Partly cloudy, with a low around 50.
Sunday
A 50 percent chance of rain. Mostly cloudy, with a high near 62. Breezy.
Sunday Night
A chance of rain and snow. Partly cloudy, with a low around 26. Blustery. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 39.
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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:
7:21 pm CDT Mar 9, 2026
Forecast Valid:
10pm CDT Mar 9, 2026-6pm CDT Mar 16, 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