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

Dangerous Heat and Possible Flooding

Dangerous heat will persist across the Southwest U.S. through Saturday with daytime highs of 110-115°F. Extreme Heat Warnings remain in effect. Dangerous heat will build across the southern Plains again beginning this weekend. Heavy to excessive rain over the Carolinas Friday may lead to isolated areas of flash flooding. Read More >

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

65°F

18°C

Humidity 93%
Wind Speed Calm
Barometer 30.06 in (1017.6 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 27 Aug 11:53 pm CDT
Extended Forecast for

Festus MO

  • Tonight

    Tonight: Clear, with a low around 62. Calm wind.

    Low: 62 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 87. Light and variable wind.

    High: 87 °F

    Sunny

  • Friday Night

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

    Low: 61 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 89. Light and variable wind.

    High: 89 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 66. Light south wind.

    Low: 66 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 95.

    High: 95 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 71.

    Low: 71 °F

    Mostly Clear

  • Monday

    Monday: Sunny and hot, with a high near 97.

    High: 97 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 74.

    Low: 74 °F

    Mostly Clear

Detailed Forecast

Tonight
Clear, with a low around 62. Calm wind.
Friday
Sunny, with a high near 87. Light and variable wind.
Friday Night
Mostly clear, with a low around 61. Calm wind.
Saturday
Sunny, with a high near 89. Light and variable wind.
Saturday Night
Mostly clear, with a low around 66. Light south wind.
Sunday
Sunny, with a high near 95.
Sunday Night
Mostly clear, with a low around 71.
Monday
Sunny and hot, with a high near 97.
Monday Night
Mostly clear, with a low around 74.
Tuesday
Sunny and hot, with a high near 97.
Tuesday Night
Mostly clear, with a low around 74.
Wednesday
Sunny and hot, with a high near 98.
Wednesday Night
Mostly clear, with a low around 76.
Thursday
Sunny and hot, with a high near 98.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Festus MO
 38.22°N 90.42°W (Elev. 499 ft)
Last Update:
9:11 pm CDT Aug 27, 2026
Forecast Valid:
11pm CDT Aug 27, 2026-6pm CDT Sep 3, 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