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.

A Few Clouds

59°F

15°C

Humidity 82%
Wind Speed N 5 mph
Barometer 29.89 in
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 18 Nov 4:50 pm CST
Extended Forecast for

Gillespie IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 44. Light north wind.

    Low: 44 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Cloudy, with a high near 56. Light and variable wind.

    High: 56 °F

    Cloudy

  • Wednesday Night

    Wednesday Night: A 20 percent chance of rain after midnight. Cloudy, with a low around 45. Light southeast wind.

    Low: 45 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Thursday

    Thursday: Rain likely, with thunderstorms also possible after 3pm. Cloudy, with a high near 60. South wind 3 to 8 mph. Chance of precipitation is 60%.

    High: 60 °F

    Rain Likely

  • Thursday Night

    Thursday Night: Rain likely, mainly after midnight. Cloudy, with a low around 49. Calm wind becoming north around 5 mph after midnight. Chance of precipitation is 60%.

    Low: 49 °F

    Rain Likely

  • Friday

    Friday: Rain. High near 58. Chance of precipitation is 80%.

    High: 58 °F

    Rain

  • Friday Night

    Friday Night: A 50 percent chance of rain, mainly before midnight. Mostly cloudy, with a low around 43.

    Low: 43 °F

    Chance Rain
    then Slight
    Chance Rain

  • Saturday

    Saturday: Mostly sunny, with a high near 58.

    High: 58 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 38.

    Low: 38 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 44. Light north wind.
Wednesday
Cloudy, with a high near 56. Light and variable wind.
Wednesday Night
A 20 percent chance of rain after midnight. Cloudy, with a low around 45. Light southeast wind.
Thursday
Rain likely, with thunderstorms also possible after 3pm. Cloudy, with a high near 60. South wind 3 to 8 mph. Chance of precipitation is 60%.
Thursday Night
Rain likely, mainly after midnight. Cloudy, with a low around 49. Calm wind becoming north around 5 mph after midnight. Chance of precipitation is 60%.
Friday
Rain. High near 58. Chance of precipitation is 80%.
Friday Night
A 50 percent chance of rain, mainly before midnight. Mostly cloudy, with a low around 43.
Saturday
Mostly sunny, with a high near 58.
Saturday Night
Mostly clear, with a low around 38.
Sunday
Sunny, with a high near 60.
Sunday Night
Partly cloudy, with a low around 41.
Monday
A 20 percent chance of rain. Partly sunny, with a high near 59.
Monday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 41.
Tuesday
A 40 percent chance of rain. Mostly cloudy, with a high near 56.
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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:
4:56 pm CST Nov 18, 2025
Forecast Valid:
5pm CST Nov 18, 2025-6pm CST Nov 25, 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