National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

43°F

6°C

Humidity 71%
Wind Speed S 18 G 26 mph
Barometer 29.61 in
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Wind Chill35°F (2°C)
Last update 9 Dec 9:50 pm CST
Extended Forecast for

Gillespie IL

Wind Advisory December 10, 03:00am until December 10, 12:00pm
Click here for hazard details and duration
Wind Advisory

  • Tonight

    Tonight: A slight chance of rain between 11pm and 4am. Mostly cloudy, with a low around 36. Breezy, with a southwest wind 16 to 20 mph, with gusts as high as 29 mph. Chance of precipitation is 20%.

    Low: 36 °F

    Slight Chance
    Rain and
    Breezy

  • Wednesday

    Wednesday: Increasing clouds, with a temperature falling to around 31 by 5pm. Breezy, with a northwest wind 14 to 24 mph, with gusts as high as 47 mph.

    High: 38 °F⇓

    Increasing
    Clouds and
    Breezy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 22. Northwest wind 5 to 11 mph.

    Low: 22 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 20 percent chance of snow after noon. Mostly cloudy, with a high near 34. Light and variable wind becoming southwest around 6 mph in the morning.

    High: 34 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Thursday Night

    Thursday Night: A chance of snow before 3am, then a slight chance of rain. Mostly cloudy, with a low around 29. Southeast wind around 6 mph becoming west after midnight. Chance of precipitation is 30%.

    Low: 29 °F

    Chance Snow
    then Slight
    Chance
    Rain/Snow

  • Friday

    Friday: Mostly cloudy, with a high near 38.

    High: 38 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 18.

    Low: 18 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 29.

    High: 29 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 5.

    Low: 5 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A slight chance of rain between 11pm and 4am. Mostly cloudy, with a low around 36. Breezy, with a southwest wind 16 to 20 mph, with gusts as high as 29 mph. Chance of precipitation is 20%.
Wednesday
Increasing clouds, with a temperature falling to around 31 by 5pm. Breezy, with a northwest wind 14 to 24 mph, with gusts as high as 47 mph.
Wednesday Night
Mostly cloudy, with a low around 22. Northwest wind 5 to 11 mph.
Thursday
A 20 percent chance of snow after noon. Mostly cloudy, with a high near 34. Light and variable wind becoming southwest around 6 mph in the morning.
Thursday Night
A chance of snow before 3am, then a slight chance of rain. Mostly cloudy, with a low around 29. Southeast wind around 6 mph becoming west after midnight. Chance of precipitation is 30%.
Friday
Mostly cloudy, with a high near 38.
Friday Night
Mostly cloudy, with a low around 18.
Saturday
Mostly cloudy, with a high near 29.
Saturday Night
Mostly cloudy, with a low around 5.
Sunday
Sunny and cold, with a high near 19.
Sunday Night
Partly cloudy, with a low around 9.
Monday
Partly sunny, with a high near 33.
Monday Night
Mostly cloudy, with a low around 20.
Tuesday
Mostly sunny, with a high near 38.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Gillespie IL
 39.12°N 89.81°W (Elev. 653 ft)
Last Update:
8:46 pm CST Dec 9, 2025
Forecast Valid:
9pm CST Dec 9, 2025-6pm CST Dec 16, 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