Friday
Mostly sunny
High:
81°F
Mostly sunny, with a high near 81. Calm wind becoming west 5 to 8 mph in the morning.
Saint Charles, MO Weather - Extended Forecast
Friday Night
Partly cloudy
Overnight low:
53°F
Partly cloudy, with a low around 53. West wind around 6 mph becoming calm after midnight.
Saturday
Sunny
High:
82°F
Sunny, with a high near 82.
Saturday Night
Mostly clear
Overnight low:
59°F
Mostly clear, with a low around 59.
Sunday
Mostly sunny
High:
81°F
Sunday Night
Mostly cloudy
Overnight low:
39°F
Monday
Partly sunny
High:
54°F
Monday Night
Partly cloudy
Overnight low:
37°F
Tuesday
Partly sunny
High:
61°F
Tuesday Night
Mostly cloudy
Overnight low:
43°F
Wednesday
Mostly sunny
High:
70°F