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

27°F

-3°C

Humidity 59%
Wind Speed S 18 G 25 mph
Barometer 30.03 in
Dewpoint 14°F (-10°C)
Visibility 10.00 mi
Wind Chill14°F (-10°C)
Last update 24 Feb 7:50 am CST
Extended Forecast for

Gillespie IL

  • Today

    Today: Mostly cloudy, with a high near 52. Breezy, with a south wind 15 to 23 mph, with gusts as high as 36 mph.

    High: 52 °F

    Mostly Cloudy
    and Breezy

  • Tonight

    Tonight: Mostly cloudy, with a low around 29. Southwest wind 8 to 13 mph becoming light and variable after midnight. Winds could gust as high as 22 mph.

    Low: 29 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 49. Light and variable wind becoming northwest around 6 mph in the morning.

    High: 49 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Rain likely before 3am, then rain and snow likely. Mostly cloudy, with a low around 33. East wind 5 to 9 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Low: 33 °F

    Chance Rain
    then
    Rain/Snow
    Likely

  • Thursday

    Thursday: A 20 percent chance of rain before noon. Partly sunny, with a high near 47. East wind 6 to 9 mph becoming north in the afternoon.

    High: 47 °F

    Slight Chance
    Rain then
    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 29.

    Low: 29 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 61.

    High: 61 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 37.

    Low: 37 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 62.

    High: 62 °F

    Sunny

Detailed Forecast

Today
Mostly cloudy, with a high near 52. Breezy, with a south wind 15 to 23 mph, with gusts as high as 36 mph.
Tonight
Mostly cloudy, with a low around 29. Southwest wind 8 to 13 mph becoming light and variable after midnight. Winds could gust as high as 22 mph.
Wednesday
Mostly sunny, with a high near 49. Light and variable wind becoming northwest around 6 mph in the morning.
Wednesday Night
Rain likely before 3am, then rain and snow likely. Mostly cloudy, with a low around 33. East wind 5 to 9 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Thursday
A 20 percent chance of rain before noon. Partly sunny, with a high near 47. East wind 6 to 9 mph becoming north in the afternoon.
Thursday Night
Mostly clear, with a low around 29.
Friday
Sunny, with a high near 61.
Friday Night
Mostly clear, with a low around 37.
Saturday
Sunny, with a high near 62.
Saturday Night
Partly cloudy, with a low around 28.
Sunday
A chance of rain and snow. Partly sunny, with a high near 42. Chance of precipitation is 30%.
Sunday Night
A chance of rain and snow. Mostly cloudy, with a low around 28. Chance of precipitation is 40%.
Monday
A 30 percent chance of rain. Partly sunny, with a high near 45.
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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:
6:46 am CST Feb 24, 2026
Forecast Valid:
8am CST Feb 24, 2026-6pm CST Mar 2, 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