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

Hazardous Weather Conditions

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

80°F

27°C

Humidity 39%
Wind Speed Vrbl 5 mph
Barometer 29.85 in (1010.5 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 21 Mar 12:53 pm CDT
Extended Forecast for

Marlborough MO

  • This Afternoon

    This Afternoon: Sunny, with a high near 90. South wind 3 to 5 mph.

    High: 90 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 66. South wind 6 to 8 mph, with gusts as high as 20 mph.

    Low: 66 °F

    Mostly Clear

  • Sunday

    Sunday: Increasing clouds, with a high near 90. Southwest wind 7 to 15 mph becoming north in the afternoon. Winds could gust as high as 25 mph.

    High: 90 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 39. North wind 10 to 17 mph, with gusts as high as 32 mph.

    Low: 39 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 58. Northeast wind around 8 mph.

    High: 58 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 42.

    Low: 42 °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: A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 73.

    High: 73 °F

    Slight Chance
    T-storms

Detailed Forecast

This Afternoon
Sunny, with a high near 90. South wind 3 to 5 mph.
Tonight
Mostly clear, with a low around 66. South wind 6 to 8 mph, with gusts as high as 20 mph.
Sunday
Increasing clouds, with a high near 90. Southwest wind 7 to 15 mph becoming north in the afternoon. Winds could gust as high as 25 mph.
Sunday Night
Partly cloudy, with a low around 39. North wind 10 to 17 mph, with gusts as high as 32 mph.
Monday
Mostly sunny, with a high near 58. Northeast wind around 8 mph.
Monday Night
Mostly cloudy, with a low around 42.
Tuesday
Mostly sunny, with a high near 65.
Tuesday Night
Mostly cloudy, with a low around 45.
Wednesday
A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 73.
Wednesday Night
A 20 percent chance of showers. Partly cloudy, with a low around 57.
Thursday
A 20 percent chance of showers. Sunny, with a high near 82.
Thursday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 47.
Friday
A 30 percent chance of showers. Partly sunny, with a high near 58.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Marlborough MO
 38.58°N 90.35°W (Elev. 531 ft)
Last Update:
12:41 pm CDT Mar 21, 2026
Forecast Valid:
1pm CDT Mar 21, 2026-6pm CDT Mar 27, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation