Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fog/Mist

16°F

-9°C

Humidity 89%
Wind Speed E 5 mph
Barometer 30.07 in
Dewpoint 13°F (-11°C)
Visibility 1.75 mi
Wind Chill8°F (-13°C)
Last update 3 Dec 3:15 am CST
Extended Forecast for

Gillespie IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 18. South wind around 8 mph.

    Low: 18 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 50 percent chance of snow, mainly after 4pm.  Mostly cloudy, with a high near 35. South wind 5 to 10 mph becoming west in the afternoon.

    High: 35 °F

    Mostly Cloudy
    then Chance
    Snow

  • Wednesday Night

    Wednesday Night: Snow likely before 2am, then a chance of flurries between 2am and 3am.  Cloudy, with a low around 9. North wind 5 to 14 mph, with gusts as high as 21 mph.  Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Low: 9 °F

    Snow Likely
    then Slight
    Chance Snow

  • Thursday

    Thursday: Sunny and cold, with a high near 19. North wind 5 to 8 mph becoming calm  in the afternoon.

    High: 19 °F

    Cold

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 4. Light and variable wind.

    Low: 4 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 33.

    High: 33 °F

    Mostly Sunny

  • Friday Night

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

    Low: 18 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 33.

    High: 33 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 20.

    Low: 20 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 18. South wind around 8 mph.
Wednesday
A 50 percent chance of snow, mainly after 4pm. Mostly cloudy, with a high near 35. South wind 5 to 10 mph becoming west in the afternoon.
Wednesday Night
Snow likely before 2am, then a chance of flurries between 2am and 3am. Cloudy, with a low around 9. North wind 5 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Thursday
Sunny and cold, with a high near 19. North wind 5 to 8 mph becoming calm in the afternoon.
Thursday Night
Partly cloudy, with a low around 4. Light and variable wind.
Friday
Mostly sunny, with a high near 33.
Friday Night
Mostly cloudy, with a low around 18.
Saturday
Partly sunny, with a high near 33.
Saturday Night
Mostly cloudy, with a low around 20.
Sunday
A slight chance of rain and snow after noon. Mostly cloudy, with a high near 32. Chance of precipitation is 20%.
Sunday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 18.
Monday
Partly sunny, with a high near 31.
Monday Night
Mostly cloudy, with a low around 23.
Tuesday
Partly sunny, with a high near 39.
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ABOUT THIS FORECAST

 
Point Forecast:
Gillespie IL
 39.12°N 89.81°W (Elev. 653 ft)
3:15 am CST Dec 3, 2025
3am CST Dec 3, 2025-6pm CST Dec 9, 2025
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

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