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

30°F

-1°C

Humidity 74%
Wind Speed N 9 G 18 mph
Barometer 30.28 in
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Wind Chill22°F (-6°C)
Last update 3 Dec 11:55 pm CST
Extended Forecast for

Gillespie IL

  • Overnight

    Overnight: A slight chance of snow before 2am, then a chance of flurries between 2am and 4am. Cloudy, with a low around 10. North wind 9 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.

    Low: 10 °F

    Slight Chance
    Snow

  • Thursday

    Thursday: Mostly cloudy through mid morning, then gradual clearing and cold, with a high near 20. North wind 3 to 8 mph.

    High: 20 °F

    Cold

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 7. Light and variable wind becoming south around 6 mph after midnight.

    Low: 7 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 33. South wind 3 to 6 mph.

    High: 33 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 20. South wind around 5 mph becoming calm in the evening.

    Low: 20 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 35.

    High: 35 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A slight chance of freezing rain after midnight. Mostly cloudy, with a low around 21. Chance of precipitation is 20%.

    Low: 21 °F

    Cloudy then
    Slight Chance
    Freezing Rain

  • Sunday

    Sunday: A 20 percent chance of snow. Mostly cloudy, with a high near 30.

    High: 30 °F

    Slight Chance
    Snow

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 12.

    Low: 12 °F

    Mostly Cloudy

Detailed Forecast

Overnight
A slight chance of snow before 2am, then a chance of flurries between 2am and 4am. Cloudy, with a low around 10. North wind 9 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.
Thursday
Mostly cloudy through mid morning, then gradual clearing and cold, with a high near 20. North wind 3 to 8 mph.
Thursday Night
Partly cloudy, with a low around 7. Light and variable wind becoming south around 6 mph after midnight.
Friday
Mostly sunny, with a high near 33. South wind 3 to 6 mph.
Friday Night
Mostly cloudy, with a low around 20. South wind around 5 mph becoming calm in the evening.
Saturday
Partly sunny, with a high near 35.
Saturday Night
A slight chance of freezing rain after midnight. Mostly cloudy, with a low around 21. Chance of precipitation is 20%.
Sunday
A 20 percent chance of snow. Mostly cloudy, with a high near 30.
Sunday Night
Mostly cloudy, with a low around 12.
Monday
Mostly sunny, with a high near 28.
Monday Night
Mostly cloudy, with a low around 19.
Tuesday
Partly sunny, with a high near 40.
Tuesday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 30.
Wednesday
A 20 percent chance of rain. Partly sunny, with a high near 45.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Gillespie IL
 39.12°N 89.81°W (Elev. 653 ft)
Last Update:
10:11 pm CST Dec 3, 2025
Forecast Valid:
12am CST Dec 4, 2025-6pm CST Dec 10, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation