


Hazardous Weather Conditions
Current conditions at
St. Louis Lambert International Airport (KSTL)
Lat: 38.75°NLon: 90.37°WElev: 604ft.
Light Rain
77°F
25°C
Humidity | 90% |
Wind Speed | NE 7 mph |
Barometer | 29.99 in (1014.5 mb) |
Dewpoint | 74°F (23°C) |
Visibility | 9.00 mi |
Heat Index | 78°F (26°C) |
Last update | 13 Jul 4:51 pm CDT |
Extended Forecast for
Saint Charles MO
This Afternoon
High: 77 °F
Chance
T-stormsTonight
Low: 70 °F
Chance
T-storms then
Partly CloudyMonday
High: 86 °F
Decreasing
CloudsMonday Night
Low: 72 °F
Mostly Cloudy
Tuesday
High: 90 °F
Partly Sunny
then Chance
T-stormsTuesday Night
Low: 73 °F
Slight Chance
T-stormsWednesday
High: 91 °F
Chance
T-stormsWednesday Night
Low: 75 °F
Chance
T-stormsThursday
High: 91 °F
Mostly Sunny
then Chance
T-storms
Detailed Forecast
This Afternoon
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a steady temperature around 77. Light east wind.
Tonight
A 30 percent chance of showers and thunderstorms, mainly before 7pm. Mostly cloudy, with a low around 70. Calm wind.
Monday
Mostly cloudy, then gradually becoming sunny, with a high near 86. Light northeast wind.
Monday Night
Mostly cloudy, with a low around 72. Southeast wind around 6 mph becoming calm in the evening.
Tuesday
A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 90. Calm wind becoming south around 6 mph in the afternoon.
Tuesday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 73.
Wednesday
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 91.
Wednesday Night
A 30 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 75.
Thursday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 91.
Thursday Night
A 40 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 73.
Friday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 89.
Friday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 73.
Saturday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90.
Saturday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.
Sunday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90.
Additional Forecasts and Information
Basemap Options
Click map to change the forecast location
Loading map...
ABOUT 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)
4:21 pm CDT Jul 13, 2025
5pm CDT Jul 13, 2025-6pm CDT Jul 20, 2025