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.

Mostly Cloudy

79°F

26°C

Humidity 74%
Wind Speed N 17 mph
Barometer 29.96 in
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 14 Jun 3:50 pm CDT
Extended Forecast for

Gillespie IL

  • This Afternoon

    This Afternoon: A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 79. North wind around 10 mph.

    High: 79 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 64. North wind 5 to 8 mph.

    Low: 64 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Sunday

    Sunday: Patchy fog before 8am. Otherwise, partly sunny, with a high near 83. Northeast wind around 7 mph.

    High: 83 °F

    Patchy Fog
    then Partly
    Sunny

  • Sunday Night

    Sunday Night: A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 67. East wind 3 to 6 mph.

    Low: 67 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Monday

    Monday: A slight chance of showers, then a chance of showers and thunderstorms after 10am. Partly sunny, with a high near 82. Calm wind becoming southeast around 5 mph in the afternoon. Chance of precipitation is 30%.

    High: 82 °F

    Chance
    T-storms

  • Monday Night

    Monday Night: A chance of showers and thunderstorms before 4am, then a slight chance of showers. Mostly cloudy, with a low around 68. Chance of precipitation is 30%.

    Low: 68 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A slight chance of showers, then a chance of showers and thunderstorms after 10am. Mostly sunny, with a high near 87. Chance of precipitation is 30%.

    High: 87 °F

    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71.

    Low: 71 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: Showers and thunderstorms likely, mainly after 1pm. Partly sunny, with a high near 85. Chance of precipitation is 70%.

    High: 85 °F

    Chance
    T-storms then
    T-storms
    Likely

Detailed Forecast

This Afternoon
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 79. North wind around 10 mph.
Tonight
Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 64. North wind 5 to 8 mph.
Sunday
Patchy fog before 8am. Otherwise, partly sunny, with a high near 83. Northeast wind around 7 mph.
Sunday Night
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 67. East wind 3 to 6 mph.
Monday
A slight chance of showers, then a chance of showers and thunderstorms after 10am. Partly sunny, with a high near 82. Calm wind becoming southeast around 5 mph in the afternoon. Chance of precipitation is 30%.
Monday Night
A chance of showers and thunderstorms before 4am, then a slight chance of showers. Mostly cloudy, with a low around 68. Chance of precipitation is 30%.
Tuesday
A slight chance of showers, then a chance of showers and thunderstorms after 10am. Mostly sunny, with a high near 87. Chance of precipitation is 30%.
Tuesday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71.
Wednesday
Showers and thunderstorms likely, mainly after 1pm. Partly sunny, with a high near 85. Chance of precipitation is 70%.
Wednesday Night
A 50 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 68.
Juneteenth
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 84.
Thursday Night
Mostly clear, with a low around 66.
Friday
Sunny, with a high near 88.
Friday Night
Mostly clear, with a low around 72.
Saturday
Sunny, with a high near 90.
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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:
2:06 pm CDT Jun 14, 2025
Forecast Valid:
3pm CDT Jun 14, 2025-6pm CDT Jun 21, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation