Severe Thunderstorms and Heavy Rainfall for the Southwest; Heat Spreads Across the Center of the Nation

Moisture will continue to move into areas of the West. This will increase showers and thunderstorms coverage and intensity, with the risk of flash flooding and damaging wind gusts. Meanwhile, heat across the Southwest will expand into the center of the nation this weekend into early next week. Trends favor this heat will spread across the Ohio Valley, mid-Atlantic next week. Read More >

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

68°F

20°C

Humidity 87%
Wind Speed Calm
Barometer 30.05 in (1017.0 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 29 Aug 11:53 pm CDT
Extended Forecast for

Lemay MO

  • Overnight

    Overnight: Mostly clear, with a low around 65. South wind around 5 mph.

    Low: 65 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny and hot, with a high near 97. South wind 5 to 8 mph.

    High: 97 °F

    Hot

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 74. South wind 5 to 7 mph.

    Low: 74 °F

    Mostly Clear

  • Monday

    Monday: Sunny and hot, with a high near 100. Heat index values as high as 103. Southwest wind 5 to 7 mph.

    High: 100 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 78. South wind 5 to 7 mph.

    Low: 78 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 101.

    High: 101 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 79.

    Low: 79 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 101.

    High: 101 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 79.

    Low: 79 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 65. South wind around 5 mph.
Sunday
Mostly sunny and hot, with a high near 97. South wind 5 to 8 mph.
Sunday Night
Mostly clear, with a low around 74. South wind 5 to 7 mph.
Monday
Sunny and hot, with a high near 100. Heat index values as high as 103. Southwest wind 5 to 7 mph.
Monday Night
Mostly clear, with a low around 78. South wind 5 to 7 mph.
Tuesday
Sunny and hot, with a high near 101.
Tuesday Night
Mostly clear, with a low around 79.
Wednesday
Sunny and hot, with a high near 101.
Wednesday Night
Mostly clear, with a low around 79.
Thursday
Sunny and hot, with a high near 100.
Thursday Night
A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 77.
Friday
A 20 percent chance of showers. Mostly sunny and hot, with a high near 97.
Friday Night
Partly cloudy, with a low around 75.
Saturday
Mostly sunny, with a high near 95.
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ABOUT THIS FORECAST

 
Point Forecast:
Lemay MO
 38.51°N 90.29°W (Elev. 502 ft)
11:36 pm CDT Aug 29, 2026
12am CDT Aug 30, 2026-6pm CDT Sep 5, 2026
 
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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