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

41°F

5°C

Humidity 86%
Wind Speed SE 7 mph
Barometer 29.97 in
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Wind Chill36°F (2°C)
Last update 17 Feb 1:15 am CST
Extended Forecast for

2 Miles S Donnellson IL

  • Overnight

    Overnight: Partly cloudy, with a low around 41. South wind around 7 mph.

    Low: 41 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 58. South wind 6 to 16 mph, with gusts as high as 30 mph.

    High: 58 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: A slight chance of rain between 11pm and 3am. Cloudy, then gradually becoming partly cloudy, with a low around 53. Breezy, with a south wind 16 to 20 mph, with gusts as high as 38 mph. Chance of precipitation is 20%.

    Low: 53 °F

    Slight Chance
    Rain and
    Breezy

  • Wednesday

    Wednesday: Sunny, with a high near 69. Southwest wind 6 to 15 mph, with gusts as high as 24 mph.

    High: 69 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers, mainly after midnight. Partly cloudy, with a low around 46. South wind around 6 mph.

    Low: 46 °F

    Chance
    Showers

  • Thursday

    Thursday: A chance of showers, with thunderstorms also possible after noon. Mostly sunny, with a high near 68. Chance of precipitation is 50%.

    High: 68 °F

    Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms before midnight. Mostly clear, with a low around 35.

    Low: 35 °F

    Chance
    Showers then
    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 48.

    High: 48 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 28.

    Low: 28 °F

    Partly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 41. South wind around 7 mph.
Tuesday
Mostly cloudy, with a high near 58. South wind 6 to 16 mph, with gusts as high as 30 mph.
Tuesday Night
A slight chance of rain between 11pm and 3am. Cloudy, then gradually becoming partly cloudy, with a low around 53. Breezy, with a south wind 16 to 20 mph, with gusts as high as 38 mph. Chance of precipitation is 20%.
Wednesday
Sunny, with a high near 69. Southwest wind 6 to 15 mph, with gusts as high as 24 mph.
Wednesday Night
A 30 percent chance of showers, mainly after midnight. Partly cloudy, with a low around 46. South wind around 6 mph.
Thursday
A chance of showers, with thunderstorms also possible after noon. Mostly sunny, with a high near 68. Chance of precipitation is 50%.
Thursday Night
A 30 percent chance of showers and thunderstorms before midnight. Mostly clear, with a low around 35.
Friday
Sunny, with a high near 48.
Friday Night
Partly cloudy, with a low around 28.
Saturday
A 30 percent chance of snow, mainly after noon. Mostly sunny, with a high near 43.
Saturday Night
A 20 percent chance of snow. Mostly clear, with a low around 24.
Sunday
Sunny, with a high near 37.
Sunday Night
Mostly clear, with a low around 17.
Monday
Sunny, with a high near 37.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles S Donnellson IL
 39°N 89.47°W (Elev. 600 ft)
Last Update:
1:01 am CST Feb 17, 2026
Forecast Valid:
1am CST Feb 17, 2026-6pm CST Feb 23, 2026
 
Forecast Discussion
 
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Additional Resources

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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