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.

Overcast

25°F

-4°C

Humidity 80%
Wind Speed E 6 mph
Barometer 30.35 in
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill18°F (-8°C)
Last update 1 Dec 9:50 am CST
Extended Forecast for

Gillespie IL

Winter Weather Advisory December 1, 12:00pm until December 2, 12:00am
Click here for hazard details and duration
Winter Weather Advisory

  • Today

    Today: Snow, mainly after 11am. The snow could be heavy at times. High near 26. East wind around 6 mph becoming calm in the afternoon. Chance of precipitation is 90%. Total daytime snow accumulation of 2 to 4 inches possible.

    High: 26 °F

    Chance Snow
    then Heavy
    Snow

  • Tonight

    Tonight: Snow, mainly before 11pm. Low around 14. Calm wind becoming northwest 5 to 7 mph in the evening. Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.

    Low: 14 °F

    Snow then
    Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 24. Northwest wind around 6 mph becoming light and variable in the afternoon.

    High: 24 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 17. Calm wind becoming south around 6 mph in the evening.

    Low: 17 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 36. South wind 5 to 8 mph becoming west in the afternoon.

    High: 36 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 9.

    Low: 9 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny and cold, with a high near 19.

    High: 19 °F

    Cold

  • Thursday Night

    Thursday Night: A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 6.

    Low: 6 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Friday

    Friday: A 30 percent chance of snow. Mostly cloudy, with a high near 31.

    High: 31 °F

    Chance Snow

Detailed Forecast

Today
Snow, mainly after 11am. The snow could be heavy at times. High near 26. East wind around 6 mph becoming calm in the afternoon. Chance of precipitation is 90%. Total daytime snow accumulation of 2 to 4 inches possible.
Tonight
Snow, mainly before 11pm. Low around 14. Calm wind becoming northwest 5 to 7 mph in the evening. Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.
Tuesday
Mostly cloudy, with a high near 24. Northwest wind around 6 mph becoming light and variable in the afternoon.
Tuesday Night
Partly cloudy, with a low around 17. Calm wind becoming south around 6 mph in the evening.
Wednesday
Partly sunny, with a high near 36. South wind 5 to 8 mph becoming west in the afternoon.
Wednesday Night
Mostly cloudy, with a low around 9.
Thursday
Mostly sunny and cold, with a high near 19.
Thursday Night
A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 6.
Friday
A 30 percent chance of snow. Mostly cloudy, with a high near 31.
Friday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 21.
Saturday
Mostly cloudy, with a high near 35.
Saturday Night
Mostly cloudy, with a low around 22.
Sunday
Mostly cloudy, with a high near 33.
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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:
10:36 am CST Dec 1, 2025
Forecast Valid:
10am CST Dec 1, 2025-6pm CST Dec 7, 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