National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Dangerous Heat in the Southwest; Severe Thunderstorms from the Central Plains into the Ohio Valley

Dangerous heat will build across the Southwest U.S. through the end of the week with daytime highs of 110-115°F. Isolated to widely scattered severe storms are expected across parts of the central and southern High Plains, Great Lakes into the Ohio Valley, and parts of the Ozarks to Lower Mississippi Valley today. Read More >

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

78°F

26°C

Humidity 71%
Wind Speed Calm
Barometer 30.00 in (1015.6 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 26 Aug 8:53 am CDT
Extended Forecast for

2 Miles SSE Festus MO

  • Today

    Today: Mostly sunny, with a high near 92. Heat index values as high as 102. Light and variable wind.

    High: 92 °F

    Mostly Sunny

  • Tonight

    Tonight: Isolated showers before 8pm. Mostly clear, with a low around 65. Calm wind. Chance of precipitation is 20%.

    Low: 65 °F

    Isolated
    Showers then
    Mostly Clear

  • Thursday

    Thursday: Patchy fog before 8am. Otherwise, sunny, with a high near 87. Calm wind becoming north around 6 mph in the afternoon.

    High: 87 °F

    Patchy Fog
    then Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 62. Light north wind.

    Low: 62 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 86. Light north wind.

    High: 86 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 61.

    Low: 61 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 88.

    High: 88 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 64.

    Low: 64 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 93.

    High: 93 °F

    Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 92. Heat index values as high as 102. Light and variable wind.
Tonight
Isolated showers before 8pm. Mostly clear, with a low around 65. Calm wind. Chance of precipitation is 20%.
Thursday
Patchy fog before 8am. Otherwise, sunny, with a high near 87. Calm wind becoming north around 6 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 62. Light north wind.
Friday
Sunny, with a high near 86. Light north wind.
Friday Night
Mostly clear, with a low around 61.
Saturday
Sunny, with a high near 88.
Saturday Night
Partly cloudy, with a low around 64.
Sunday
Sunny, with a high near 93.
Sunday Night
Mostly clear, with a low around 70.
Monday
Sunny, with a high near 96.
Monday Night
Mostly clear, with a low around 72.
Tuesday
Mostly sunny, with a high near 95.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSE Festus MO
 38.2°N 90.39°W (Elev. 495 ft)
Last Update:
7:36 am CDT Aug 26, 2026
Forecast Valid:
9am CDT Aug 26, 2026-6pm CDT Sep 1, 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