Showers and Storms in the East; Dangerously Hot and Dry in the West

Scattered showers and storms are expected across portions of the Central and Eastern U.S. through the end of the week. Meanwhile, dangerous heat will intensify across the Desert Southwest and Intermountain West. Hot, dry weather and increasing winds will allow elevated wildfire conditions to return to the northern Intermountain West, where air quality issues persist from ongoing fires. Read More >

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

72°F

22°C

Humidity 90%
Wind Speed Calm
Barometer 30.06 in
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Last update 8 Aug 6:15 am CDT
Extended Forecast for

3 Miles S Carlinville IL

  • Today

    Today: Sunny, with a high near 88. Light west wind.

    High: 88 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 67. Calm wind.

    Low: 67 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 91. Heat index values as high as 101. Light south wind increasing to 5 to 10 mph in the morning.

    High: 91 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 72. South wind 7 to 11 mph.

    Low: 72 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 93. Southwest wind 6 to 9 mph.

    High: 93 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 73.

    Low: 73 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 92.

    High: 92 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 50 percent chance of showers and thunderstorms, mainly after 1am.  Partly cloudy, with a low around 72.

    Low: 72 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after 1pm.  Mostly sunny, with a high near 89. Chance of precipitation is 30%.

    High: 89 °F

    Chance
    Showers

Detailed Forecast

Today
Sunny, with a high near 88. Light west wind.
Tonight
Mostly clear, with a low around 67. Calm wind.
Sunday
Mostly sunny, with a high near 91. Heat index values as high as 101. Light south wind increasing to 5 to 10 mph in the morning.
Sunday Night
Mostly clear, with a low around 72. South wind 7 to 11 mph.
Monday
Mostly sunny, with a high near 93. Southwest wind 6 to 9 mph.
Monday Night
Partly cloudy, with a low around 73.
Tuesday
Mostly sunny, with a high near 92.
Tuesday Night
A 50 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 72.
Wednesday
A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 89. Chance of precipitation is 30%.
Wednesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 68. Chance of precipitation is 60%.
Thursday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 83.
Thursday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 64.
Friday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 81.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles S Carlinville IL
 39.23°N 89.89°W (Elev. 604 ft)
3:11 am CDT Aug 8, 2026
6am CDT Aug 8, 2026-6pm CDT Aug 14, 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