Dangerous Heat and Possible Flooding
Dangerous heat will persist across the Southwest U.S. through Saturday with daytime highs of 110-115°F. Extreme Heat Warnings remain in effect. Dangerous heat will build across the southern Plains again beginning this weekend. Heavy to excessive rain over the Carolinas Friday may lead to isolated areas of flash flooding. Read More >
Current conditions at
St. Louis Lambert International Airport (KSTL)
Lat: 38.75°NLon: 90.37°WElev: 604ft.
A Few Clouds
67°F
19°C
| Humidity | 87% |
| Wind Speed | W 3 mph |
| Barometer | 30.10 in (1018.2 mb) |
| Dewpoint | 63°F (17°C) |
| Visibility | 10.00 mi |
| Last update | 28 Aug 3:51 am CDT |
Extended Forecast for
Clayton MO
Today
High: 87 °F
Sunny
Tonight
Low: 66 °F
Mostly Clear
Saturday
High: 89 °F
Increasing
CloudsSaturday Night
Low: 70 °F
Decreasing
CloudsSunday
High: 95 °F
Sunny
Sunday Night
Low: 75 °F
Mostly Clear
Monday
High: 98 °F
Hot
Monday Night
Low: 78 °F
Mostly Clear
Tuesday
High: 99 °F
Hot
Detailed Forecast
Today
Sunny, with a high near 87. Calm wind becoming northeast around 5 mph in the afternoon.
Tonight
Mostly clear, with a low around 66. Light east wind.
Saturday
Increasing clouds, with a high near 89. Calm wind becoming south 5 to 7 mph in the morning.
Saturday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 70. Southeast wind 5 to 7 mph.
Sunday
Sunny, with a high near 95. South wind 6 to 9 mph.
Sunday Night
Mostly clear, with a low around 75.
Monday
Sunny and hot, with a high near 98.
Monday Night
Mostly clear, with a low around 78.
Tuesday
Sunny and hot, with a high near 99.
Tuesday Night
Mostly clear, with a low around 80.
Wednesday
Sunny and hot, with a high near 99.
Wednesday Night
Mostly clear, with a low around 80.
Thursday
A 20 percent chance of showers. Sunny and hot, with a high near 99.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Clayton MO
38.64°N 90.34°W (Elev. 522 ft)
38.64°N 90.34°W (Elev. 522 ft)
3:31 am CDT Aug 28, 2026
4am CDT Aug 28, 2026-6pm CDT Sep 3, 2026
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