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.
Partly Cloudy
86°F
30°C
| Humidity | 37% |
| Wind Speed | NE 7 mph |
| Barometer | 30.11 in (1018.7 mb) |
| Dewpoint | 57°F (14°C) |
| Visibility | 10.00 mi |
| Heat Index | 85°F (29°C) |
| Last update | 28 Aug 3:51 pm CDT |
Extended Forecast for
Saint Charles MO
Tonight
Low: 66 °F
Mostly Clear
Saturday
High: 89 °F
Mostly Sunny
Saturday Night
Low: 71 °F
Partly Cloudy
Sunday
High: 94 °F
Sunny
Sunday Night
Low: 76 °F
Mostly Clear
Monday
High: 97 °F
Hot
Monday Night
Low: 79 °F
Mostly Clear
Tuesday
High: 97 °F
Hot
Tuesday Night
Low: 80 °F
Mostly Clear
Detailed Forecast
Tonight
Mostly clear, with a low around 66. Light and variable wind.
Saturday
Mostly sunny, with a high near 89. Calm wind becoming south around 6 mph in the morning.
Saturday Night
Partly cloudy, with a low around 71. South wind around 7 mph.
Sunday
Sunny, with a high near 94. South wind 6 to 9 mph.
Sunday Night
Mostly clear, with a low around 76. South wind around 8 mph.
Monday
Sunny and hot, with a high near 97.
Monday Night
Mostly clear, with a low around 79.
Tuesday
Sunny and hot, with a high near 97.
Tuesday Night
Mostly clear, with a low around 80.
Wednesday
Sunny, with a high near 96.
Wednesday Night
Mostly clear, with a low around 79.
Thursday
Sunny, with a high near 96.
Thursday Night
Mostly clear, with a low around 79.
Friday
Mostly sunny, with a high near 95.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Saint Charles MO
38.78°N 90.51°W (Elev. 597 ft)
38.78°N 90.51°W (Elev. 597 ft)
1:25 pm CDT Aug 28, 2026
3pm CDT Aug 28, 2026-6pm CDT Sep 4, 2026
Additional Resources
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