Saturday
Hot
High:
97°F
Sunny and hot, with a high near 97. Heat index values as high as 107. Southwest wind 9 to 13 mph, with gusts as high as 23 mph.
Saint Charles, MO Weather - Extended Forecast
Saturday Night
Mostly clear
Overnight low:
77°F
Mostly clear, with a low around 77. South wind 7 to 10 mph, with gusts as high as 20 mph.
Sunday
Hot
High:
97°F
Sunny and hot, with a high near 97.
Sunday Night
Mostly clear
Overnight low:
77°F
Mostly clear, with a low around 77.
Monday
Hot
High:
97°F
Monday Night
Mostly clear
Overnight low:
77°F
Tuesday
Slight chance of thunderstorms
High:
96°F
Tuesday Night
Partly cloudy
Overnight low:
76°F
Wednesday
Mostly sunny
High:
95°F
Wednesday Night
Partly cloudy
Overnight low:
76°F
Thursday
Chance of thunderstorms
High:
93°F