Hazardous Weather Conditions
Current conditions at
St. Louis Lambert International Airport (KSTL)
Lat: 38.75°NLon: 90.37°WElev: 604ft.
Partly Cloudy
91°F
33°C
| Humidity | 64% |
| Wind Speed | NW 8 mph |
| Barometer | 30.02 in (1015.1 mb) |
| Dewpoint | 77°F (25°C) |
| Visibility | 10.00 mi |
| Heat Index | 105°F (41°C) |
| Last update | 19 Aug 12:51 pm CDT |
Extended Forecast for
Saint Charles MO
Heat Advisory August 19, 01:17pm until August 19, 08:00pm
NOW until 8:00pm Tue
Heat Advisory
This Afternoon
High: 93 °F
Slight Chance
T-stormsTonight
Low: 72 °F
Slight Chance
T-storms then
Partly CloudyWednesday
High: 85 °F
Mostly Sunny
Wednesday Night
Low: 66 °F
Mostly Clear
Thursday
High: 84 °F
Sunny
Thursday Night
Low: 65 °F
Clear
Friday
High: 86 °F
Sunny
Friday Night
Low: 67 °F
Mostly Clear
Detailed Forecast
This Afternoon
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93. Heat index values as high as 105. Northwest wind around 7 mph.
Tonight
A 20 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 72. North wind 5 to 7 mph.
Wednesday
Mostly sunny, with a high near 85. North wind 6 to 9 mph.
Wednesday Night
Mostly clear, with a low around 66. Northeast wind 5 to 7 mph.
Thursday
Sunny, with a high near 84. Northeast wind 5 to 8 mph.
Thursday Night
Clear, with a low around 65.
Friday
Sunny, with a high near 86.
Friday Night
Mostly clear, with a low around 67.
Saturday
Mostly sunny, with a high near 86.
Saturday Night
Mostly clear, with a low around 63.
Sunday
Sunny, with a high near 81.
Sunday Night
Mostly clear, with a low around 59.
Monday
Mostly sunny, with a high near 76.
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)
12:01 pm CDT Aug 19, 2025
1pm CDT Aug 19, 2025-6pm CDT Aug 25, 2025
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