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.
Fair
70°F
21°C
| Humidity | 73% |
| Wind Speed | Calm |
| Barometer | 30.08 in (1017.4 mb) |
| Dewpoint | 61°F (16°C) |
| Visibility | 10.00 mi |
| Last update | 27 Aug 11:51 pm CDT |
Extended Forecast for
Saint Charles MO
Overnight
Low: 64 °F
Mostly Clear
Friday
High: 86 °F
Sunny
Friday Night
Low: 64 °F
Partly Cloudy
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: 96 °F
Mostly Sunny
Monday Night
Low: 79 °F
Mostly Clear
Detailed Forecast
Overnight
Mostly clear, with a low around 64. Calm wind.
Friday
Sunny, with a high near 86. Light and variable wind.
Friday Night
Partly cloudy, with a low around 64. Light and variable wind.
Saturday
Mostly sunny, with a high near 89. South wind 3 to 6 mph.
Saturday Night
Partly cloudy, with a low around 71. Southeast wind around 7 mph.
Sunday
Sunny, with a high near 94.
Sunday Night
Mostly clear, with a low around 76.
Monday
Mostly sunny, with a high near 96.
Monday Night
Mostly clear, with a low around 79.
Tuesday
Sunny, with a high near 96.
Tuesday Night
Mostly clear, with a low around 79.
Wednesday
Sunny, with a high near 96.
Wednesday Night
Mostly clear, with a low around 79.
Thursday
Sunny, with a high near 96.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Saint Charles MO
38.8°N 90.51°W (Elev. 499 ft)
38.8°N 90.51°W (Elev. 499 ft)
12:26 am CDT Aug 28, 2026
12am CDT Aug 28, 2026-6pm CDT Sep 3, 2026
Additional Resources
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