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

62°F

17°C

Humidity 75%
Wind Speed SW 3 mph
Barometer 29.92 in (1013.0 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 16 Jun 12:53 am CDT
Extended Forecast for

Barnhart MO

  • Overnight

    Overnight: Clear, with a low around 56. Calm wind.

    Low: 56 °F

    Clear

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms, mainly before 3pm. Increasing clouds, with a high near 82. Light and variable wind becoming west 5 to 8 mph in the morning.

    High: 82 °F

    Sunny then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 58. West wind around 6 mph becoming calm in the evening.

    Low: 58 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 91. South wind 5 to 10 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 37 mph.

    High: 91 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms before 4am, then a chance of showers. Low around 69. West wind 6 to 14 mph, with gusts as high as 31 mph. Chance of precipitation is 80%.

    Low: 69 °F

    T-storms

  • Thursday

    Thursday: A chance of showers, with thunderstorms also possible after 10am. Mostly sunny, with a high near 81. Chance of precipitation is 40%.

    High: 81 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A 20 percent chance of showers before 1am. Partly cloudy, with a low around 59.

    Low: 59 °F

    Slight Chance
    Showers

  • Juneteenth

    Juneteenth: Sunny, with a high near 83.

    High: 83 °F

    Sunny

  • Friday Night

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

    Low: 61 °F

    Mostly Clear

Detailed Forecast

Overnight
Clear, with a low around 56. Calm wind.
Tuesday
A 40 percent chance of showers and thunderstorms, mainly before 3pm. Increasing clouds, with a high near 82. Light and variable wind becoming west 5 to 8 mph in the morning.
Tuesday Night
Mostly clear, with a low around 58. West wind around 6 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 91. South wind 5 to 10 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 37 mph.
Wednesday Night
Showers and thunderstorms before 4am, then a chance of showers. Low around 69. West wind 6 to 14 mph, with gusts as high as 31 mph. Chance of precipitation is 80%.
Thursday
A chance of showers, with thunderstorms also possible after 10am. Mostly sunny, with a high near 81. Chance of precipitation is 40%.
Thursday Night
A 20 percent chance of showers before 1am. Partly cloudy, with a low around 59.
Juneteenth
Sunny, with a high near 83.
Friday Night
Mostly clear, with a low around 61.
Saturday
A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 86.
Saturday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 67.
Sunday
Showers and thunderstorms likely. Mostly cloudy, with a high near 87. Chance of precipitation is 60%.
Sunday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 69. Chance of precipitation is 70%.
Monday
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 86.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Barnhart MO
 38.31°N 90.39°W (Elev. 499 ft)
Last Update:
1:26 am CDT Jun 16, 2026
Forecast Valid:
1am CDT Jun 16, 2026-6pm CDT Jun 22, 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