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

Hazardous Weather Conditions

Current conditions at

St. Louis, Spirit Of St. Louis Airport (KSUS)

Lat: 38.66°NLon: 90.66°WElev: 463ft.

Fair

80°F

27°C

Humidity 76%
Wind Speed SW 5 mph
Barometer 29.98 in (1013.9 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 22 Jun 12:54 am CDT
Extended Forecast for

3 Miles WSW Old Monroe MO

Heat Advisory June 22, 02:43am until June 24, 09:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory June 22, 02:43am until June 24, 09:00pm

    NOW until 9:00pm Tue

    Heat Advisory

  • Overnight

    Low: 75 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 94. Heat index values as high as 102. Southwest wind 7 to 13 mph, with gusts as high as 21 mph.

    High: 94 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 76. South wind 6 to 8 mph.

    Low: 76 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 95. Heat index values as high as 104. Southwest wind 6 to 9 mph.

    High: 95 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 75. South wind around 6 mph becoming calm in the evening.

    Low: 75 °F

    Mostly Clear

  • Tuesday

    Tuesday: A slight chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 94. Chance of precipitation is 20%.

    High: 94 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 74.

    Low: 74 °F

    Slight Chance
    T-storms

  • Wednesday

    Wednesday: Mostly sunny, with a high near 93.

    High: 93 °F

    Mostly Sunny

Detailed Forecast

Overnight
Clear, with a low around 75. South wind around 6 mph.
Sunday
Sunny, with a high near 94. Heat index values as high as 102. Southwest wind 7 to 13 mph, with gusts as high as 21 mph.
Sunday Night
Clear, with a low around 76. South wind 6 to 8 mph.
Monday
Sunny, with a high near 95. Heat index values as high as 104. Southwest wind 6 to 9 mph.
Monday Night
Mostly clear, with a low around 75. South wind around 6 mph becoming calm in the evening.
Tuesday
A slight chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 94. Chance of precipitation is 20%.
Tuesday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 74.
Wednesday
Mostly sunny, with a high near 93.
Wednesday Night
Mostly clear, with a low around 74.
Thursday
A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 94.
Thursday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73.
Friday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.
Friday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.
Saturday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WSW Old Monroe MO
 38.92°N 90.79°W (Elev. 466 ft)
Last Update:
2:36 am CDT Jun 22, 2025
Forecast Valid:
2am CDT Jun 22, 2025-6pm CDT Jun 28, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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