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

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

70°F

21°C

Humidity 59%
Wind Speed SE 6 mph
Barometer 29.76 in (1007.3 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 21 Mar 9:53 pm CDT
Extended Forecast for

Festus MO

  • Tonight

    Tonight: Clear, with a low around 64. South wind around 7 mph.

    Low: 64 °F

    Clear

  • Sunday

    Sunday: Increasing clouds, with a high near 91. Southwest wind 6 to 11 mph becoming west in the afternoon. Winds could gust as high as 24 mph.

    High: 91 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 38. North wind 10 to 17 mph, with gusts as high as 31 mph.

    Low: 38 °F

    Decreasing
    Clouds

  • Monday

    Monday: Mostly sunny, with a high near 58. Northeast wind 6 to 9 mph.

    High: 58 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 40. Light east wind.

    Low: 40 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 65.

    High: 65 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 45.

    Low: 45 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 76.

    High: 76 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of rain. Partly cloudy, with a low around 56.

    Low: 56 °F

    Slight Chance
    Rain

Detailed Forecast

Tonight
Clear, with a low around 64. South wind around 7 mph.
Sunday
Increasing clouds, with a high near 91. Southwest wind 6 to 11 mph becoming west in the afternoon. Winds could gust as high as 24 mph.
Sunday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 38. North wind 10 to 17 mph, with gusts as high as 31 mph.
Monday
Mostly sunny, with a high near 58. Northeast wind 6 to 9 mph.
Monday Night
Mostly cloudy, with a low around 40. Light east wind.
Tuesday
Mostly sunny, with a high near 65.
Tuesday Night
Mostly cloudy, with a low around 45.
Wednesday
Partly sunny, with a high near 76.
Wednesday Night
A 20 percent chance of rain. Partly cloudy, with a low around 56.
Thursday
Sunny, with a high near 86.
Thursday Night
A 30 percent chance of rain and thunderstorms. Partly cloudy, with a low around 45.
Friday
A 40 percent chance of rain. Partly sunny, with a high near 59.
Friday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 36.
Saturday
A 20 percent chance of rain. Partly sunny, with a high near 58.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Festus MO
 38.22°N 90.39°W (Elev. 446 ft)
Last Update:
9:51 pm CDT Mar 21, 2026
Forecast Valid:
10pm CDT Mar 21, 2026-6pm CDT Mar 28, 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