Dangerous Heat over the South-Central and Southwest U.S. Through Next Week

Dangerous heat persists across the Desert Southwest through this weekend and across the Southern Plains and Lower Mississippi Valley through at least the middle of next week. Numerous daily record high temperatures are expected through at least Tuesday for much of Texas and Oklahoma as well as portions of Louisiana, New Mexico, and Arizona. Read More >

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

82°F

28°C

Humidity 62%
Wind Speed NW 5 mph
Barometer 29.98 in
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index85°F (29°C)
Last update 21 Aug 6:45 pm CDT
Extended Forecast for

Gillespie IL

  • Tonight

    Tonight: Mostly clear, with a low around 66. Light and variable wind.

    Low: 66 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 84. Northwest wind 5 to 10 mph.

    High: 84 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 61. Northwest wind 5 to 7 mph becoming calm  in the evening.

    Low: 61 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 81. Calm wind becoming north around 6 mph in the afternoon.

    High: 81 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 59. Light north wind.

    Low: 59 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 80.

    High: 80 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 62.

    Low: 62 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 83.

    High: 83 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 66.

    Low: 66 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 66. Light and variable wind.
Saturday
Sunny, with a high near 84. Northwest wind 5 to 10 mph.
Saturday Night
Mostly clear, with a low around 61. Northwest wind 5 to 7 mph becoming calm in the evening.
Sunday
Sunny, with a high near 81. Calm wind becoming north around 6 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 59. Light north wind.
Monday
Mostly sunny, with a high near 80.
Monday Night
Mostly cloudy, with a low around 62.
Tuesday
Partly sunny, with a high near 83.
Tuesday Night
Partly cloudy, with a low around 66.
Wednesday
Mostly sunny, with a high near 86.
Wednesday Night
Mostly clear, with a low around 65.
Thursday
Sunny, with a high near 86.
Thursday Night
Mostly clear, with a low around 65.
Friday
Mostly sunny, with a high near 86.
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ABOUT THIS FORECAST

 
Point Forecast:
Gillespie IL
 39.12°N 89.81°W (Elev. 653 ft)
5:51 pm CDT Aug 21, 2026
7pm CDT Aug 21, 2026-6pm CDT Aug 28, 2026
 
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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