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

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

36°F

2°C

Humidity 92%
Wind Speed NA
Barometer 30.31 in
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Last update 4 Nov 5:15 am CST
Extended Forecast for

Gillespie IL

  • Today

    Today: Partly sunny, then gradually becoming sunny, with a high near 67. South wind 6 to 15 mph, with gusts as high as 24 mph.

    High: 67 °F

    Becoming
    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 50. Southwest wind 11 to 14 mph, with gusts as high as 23 mph.

    Low: 50 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 69. Southwest wind 8 to 14 mph becoming north in the afternoon. Winds could gust as high as 22 mph.

    High: 69 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 36. North wind around 6 mph becoming light and variable in the evening.

    Low: 36 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 63. Southeast wind 5 to 14 mph, with gusts as high as 22 mph.

    High: 63 °F

    Sunny

  • Thursday Night

    Thursday Night: A 40 percent chance of rain after midnight. Mostly cloudy, with a low around 51.

    Low: 51 °F

    Mostly Cloudy
    then Chance
    Rain

  • Friday

    Friday: A 30 percent chance of rain before noon. Partly sunny, with a high near 67.

    High: 67 °F

    Chance Rain
    then Mostly
    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 39.

    Low: 39 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 63.

    High: 63 °F

    Mostly Sunny

Detailed Forecast

Today
Partly sunny, then gradually becoming sunny, with a high near 67. South wind 6 to 15 mph, with gusts as high as 24 mph.
Tonight
Mostly clear, with a low around 50. Southwest wind 11 to 14 mph, with gusts as high as 23 mph.
Wednesday
Sunny, with a high near 69. Southwest wind 8 to 14 mph becoming north in the afternoon. Winds could gust as high as 22 mph.
Wednesday Night
Mostly clear, with a low around 36. North wind around 6 mph becoming light and variable in the evening.
Thursday
Sunny, with a high near 63. Southeast wind 5 to 14 mph, with gusts as high as 22 mph.
Thursday Night
A 40 percent chance of rain after midnight. Mostly cloudy, with a low around 51.
Friday
A 30 percent chance of rain before noon. Partly sunny, with a high near 67.
Friday Night
Mostly clear, with a low around 39.
Saturday
Mostly sunny, with a high near 63.
Saturday Night
A 20 percent chance of rain before midnight. Partly cloudy, with a low around 37.
Sunday
Mostly sunny, with a high near 47.
Sunday Night
Mostly clear, with a low around 25.
Monday
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:
4:46 am CST Nov 4, 2025
Forecast Valid:
5am CST Nov 4, 2025-6pm CST Nov 10, 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