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.

Overcast

48°F

9°C

Humidity 94%
Wind Speed W 9 mph
Barometer 29.98 in
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Wind Chill44°F (7°C)
Last update 6 May 7:50 am CDT
Extended Forecast for

Gillespie IL

  • Today

    Today: Cloudy, then gradually becoming mostly sunny, with a high near 58. Light west wind becoming northwest 5 to 9 mph in the morning.

    High: 58 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: Mostly clear, with a low around 38. Calm wind.

    Low: 38 °F

    Mostly Clear

  • Thursday

    Thursday: Partly sunny, then gradually becoming sunny, with a high near 63. Calm wind becoming west 5 to 9 mph in the morning.

    High: 63 °F

    Becoming
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 44. South wind 3 to 7 mph.

    Low: 44 °F

    Mostly Clear

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 71. Southwest wind 7 to 13 mph, with gusts as high as 20 mph.

    High: 71 °F

    Sunny then
    Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Partly cloudy, with a low around 48. Chance of precipitation is 50%.

    Low: 48 °F

    Chance
    Showers

  • Saturday

    Saturday: Sunny, with a high near 77.

    High: 77 °F

    Sunny

  • Saturday Night

    Saturday Night: A 50 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 54.

    Low: 54 °F

    Partly Cloudy
    then Chance
    T-storms

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 68.

    High: 68 °F

    Chance
    T-storms

Detailed Forecast

Today
Cloudy, then gradually becoming mostly sunny, with a high near 58. Light west wind becoming northwest 5 to 9 mph in the morning.
Tonight
Mostly clear, with a low around 38. Calm wind.
Thursday
Partly sunny, then gradually becoming sunny, with a high near 63. Calm wind becoming west 5 to 9 mph in the morning.
Thursday Night
Mostly clear, with a low around 44. South wind 3 to 7 mph.
Friday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 71. Southwest wind 7 to 13 mph, with gusts as high as 20 mph.
Friday Night
A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Partly cloudy, with a low around 48. Chance of precipitation is 50%.
Saturday
Sunny, with a high near 77.
Saturday Night
A 50 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 54.
Sunday
A 30 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 68.
Sunday Night
Partly cloudy, with a low around 44.
Monday
Sunny, with a high near 68.
Monday Night
A 20 percent chance of showers. Mostly clear, with a low around 46.
Tuesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 74.
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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:
7:35 am CDT May 6, 2026
Forecast Valid:
8am CDT May 6, 2026-6pm CDT May 12, 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