Saturday
Sunny
High:
80°F
Sunny, with a high near 80.
Saint Charles, MO Weather - Extended Forecast
Saturday Night
Partly cloudy
Overnight low:
61°F
Partly cloudy, with a low around 61.
Sunday
Sunny
High:
83°F
Sunny, with a high near 83.
Sunday Night
Partly cloudy
Overnight low:
66°F
Partly cloudy, with a low around 66.
Monday
Partly sunny
High:
85°F
Monday Night
Slight chance of thunderstorms
Overnight low:
68°F
Tuesday
Mostly sunny
High:
86°F
Tuesday Night
Mostly clear
Overnight low:
69°F
Wednesday
Mostly sunny
High:
89°F