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

40°F

4°C

Humidity 60%
Wind Speed Calm
Barometer 30.04 in
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Last update 28 Feb 3:35 am CST
Extended Forecast for

New Douglas IL

  • Overnight

    Overnight: Mostly clear, with a steady temperature around 42. North wind around 7 mph.

    Low: 42 °F

    Mostly Clear

  • Saturday

    Saturday: A 20 percent chance of rain after 1pm. Mostly sunny, with a high near 59. Northeast wind 5 to 9 mph becoming south in the afternoon.

    High: 59 °F

    Mostly Sunny
    then Slight
    Chance Rain

  • Saturday Night

    Saturday Night: A 20 percent chance of rain before 8pm. Partly cloudy, with a low around 27. Southeast wind 5 to 13 mph becoming north in the evening. Winds could gust as high as 20 mph.

    Low: 27 °F

    Slight Chance
    Rain then
    Partly Cloudy

  • Sunday

    Sunday: Increasing clouds, with a high near 42. Northeast wind 10 to 13 mph.

    High: 42 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: Snow likely. Cloudy, with a low around 29. Northeast wind around 10 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.

    Low: 29 °F

    Snow Likely

  • Monday

    Monday: A chance of snow before 9am, then a chance of rain. Cloudy, with a high near 41. Chance of precipitation is 30%.

    High: 41 °F

    Chance
    Rain/Snow
    then Slight
    Chance Rain

  • Monday Night

    Monday Night: Rain. Low around 36. Chance of precipitation is 80%.

    Low: 36 °F

    Rain

  • Tuesday

    Tuesday: Rain and possibly a thunderstorm. High near 57. Chance of precipitation is 90%.

    High: 57 °F

    Rain

  • Tuesday Night

    Tuesday Night: Rain and possibly a thunderstorm. Low around 46. Chance of precipitation is 80%.

    Low: 46 °F

    Rain

Detailed Forecast

Overnight
Mostly clear, with a steady temperature around 42. North wind around 7 mph.
Saturday
A 20 percent chance of rain after 1pm. Mostly sunny, with a high near 59. Northeast wind 5 to 9 mph becoming south in the afternoon.
Saturday Night
A 20 percent chance of rain before 8pm. Partly cloudy, with a low around 27. Southeast wind 5 to 13 mph becoming north in the evening. Winds could gust as high as 20 mph.
Sunday
Increasing clouds, with a high near 42. Northeast wind 10 to 13 mph.
Sunday Night
Snow likely. Cloudy, with a low around 29. Northeast wind around 10 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.
Monday
A chance of snow before 9am, then a chance of rain. Cloudy, with a high near 41. Chance of precipitation is 30%.
Monday Night
Rain. Low around 36. Chance of precipitation is 80%.
Tuesday
Rain and possibly a thunderstorm. High near 57. Chance of precipitation is 90%.
Tuesday Night
Rain and possibly a thunderstorm. Low around 46. Chance of precipitation is 80%.
Wednesday
Rain likely and possibly a thunderstorm. Cloudy, with a high near 61. Chance of precipitation is 70%.
Wednesday Night
Rain likely and possibly a thunderstorm. Mostly cloudy, with a low around 48. Chance of precipitation is 60%.
Thursday
A 50 percent chance of rain. Partly sunny, with a high near 66.
Thursday Night
A 50 percent chance of rain. Partly cloudy, with a low around 53.
Friday
Rain likely and possibly a thunderstorm. Mostly cloudy, with a high near 69. Chance of precipitation is 70%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
New Douglas IL
 38.98°N 89.67°W (Elev. 620 ft)
Last Update:
1:36 am CST Feb 28, 2026
Forecast Valid:
3am CST Feb 28, 2026-6pm CST Mar 6, 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