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

88°F

31°C

Humidity 70%
Wind Speed S 12 mph
Barometer 29.98 in
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index100°F (38°C)
Last update 29 Jun 11:50 am CDT
Extended Forecast for

East Gillespie IL

Heat Advisory June 29, 12:18pm until July 3, 10:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory June 29, 12:18pm until July 3, 10:00pm

    NOW until 10:00pm Fri

    Heat Advisory

  • This Afternoon

    High: 93 °F

    Partly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 74. South wind 6 to 13 mph, with gusts as high as 20 mph.

    Low: 74 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 95. Heat index values as high as 107. South wind 6 to 10 mph.

    High: 95 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 74. South wind 5 to 8 mph.

    Low: 74 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 94. Southwest wind 5 to 9 mph.

    High: 94 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 75.

    Low: 75 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 95.

    High: 95 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 74.

    Low: 74 °F

    Partly Cloudy

Detailed Forecast

This Afternoon
Partly sunny, with a high near 93. Heat index values as high as 106. South wind 10 to 14 mph.
Tonight
Partly cloudy, with a low around 74. South wind 6 to 13 mph, with gusts as high as 20 mph.
Tuesday
Sunny, with a high near 95. Heat index values as high as 107. South wind 6 to 10 mph.
Tuesday Night
Clear, with a low around 74. South wind 5 to 8 mph.
Wednesday
Sunny, with a high near 94. Southwest wind 5 to 9 mph.
Wednesday Night
Mostly clear, with a low around 75.
Thursday
Sunny, with a high near 95.
Thursday Night
Partly cloudy, with a low around 74.
Friday
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Sunny, with a high near 92.
Friday Night
Partly cloudy, with a low around 73.
Independence Day
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92.
Saturday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.
Sunday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
East Gillespie IL
 39.14°N 89.81°W (Elev. 663 ft)
Last Update:
12:01 pm CDT Jun 29, 2026
Forecast Valid:
12pm CDT Jun 29, 2026-6pm CDT Jul 5, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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