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

52°F

11°C

Humidity 77%
Wind Speed S 8 mph
Barometer 29.91 in
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Wind Chill49°F (9°C)
Last update 8 May 6:45 am CDT
Extended Forecast for

Gillespie IL

  • Today

    Today: Scattered showers and thunderstorms, then showers likely and possibly a thunderstorm after 4pm. Increasing clouds, with a high near 70. South wind 7 to 11 mph becoming west in the afternoon. Chance of precipitation is 60%.

    High: 70 °F

    Mostly Sunny
    then Showers
    Likely

  • Tonight

    Tonight: Showers and possibly a thunderstorm before midnight, then isolated showers between midnight and 1am. Low around 48. Northwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 80%.

    Low: 48 °F

    Showers then
    Isolated
    Showers

  • Saturday

    Saturday: Partly sunny, then gradually becoming sunny, with a high near 76. West wind 6 to 11 mph.

    High: 76 °F

    Becoming
    Sunny

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms between 1am and 4am, then a chance of showers after 4am. Increasing clouds, with a low around 52. Light and variable wind becoming northwest around 5 mph after midnight. Chance of precipitation is 40%.

    Low: 52 °F

    Mostly Clear
    then Chance
    Showers

  • Sunday

    Sunday: Partly sunny, with a high near 65. North wind 7 to 9 mph.

    High: 65 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 42.

    Low: 42 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 67.

    High: 67 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 45.

    Low: 45 °F

    Mostly Clear

  • Tuesday

    Tuesday: A slight chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 73. Breezy. Chance of precipitation is 20%.

    High: 73 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms and
    Breezy

Detailed Forecast

Today
Scattered showers and thunderstorms, then showers likely and possibly a thunderstorm after 4pm. Increasing clouds, with a high near 70. South wind 7 to 11 mph becoming west in the afternoon. Chance of precipitation is 60%.
Tonight
Showers and possibly a thunderstorm before midnight, then isolated showers between midnight and 1am. Low around 48. Northwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 80%.
Saturday
Partly sunny, then gradually becoming sunny, with a high near 76. West wind 6 to 11 mph.
Saturday Night
A chance of showers and thunderstorms between 1am and 4am, then a chance of showers after 4am. Increasing clouds, with a low around 52. Light and variable wind becoming northwest around 5 mph after midnight. Chance of precipitation is 40%.
Sunday
Partly sunny, with a high near 65. North wind 7 to 9 mph.
Sunday Night
Mostly clear, with a low around 42.
Monday
Sunny, with a high near 67.
Monday Night
Mostly clear, with a low around 45.
Tuesday
A slight chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 73. Breezy. Chance of precipitation is 20%.
Tuesday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 51.
Wednesday
Sunny, with a high near 72.
Wednesday Night
Mostly clear, with a low around 47.
Thursday
Sunny, with a high near 75.
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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:
4:26 am CDT May 8, 2026
Forecast Valid:
7am CDT May 8, 2026-6pm CDT May 14, 2026
 
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