10-Day Weather Forecast - Saint Charles, MO

Mostly sunny. Not as cool with highs in the mid 50s. South winds 5 to 10 mph with gusts up to 20 mph.

Mostly cloudy in the evening then becoming partly cloudy. Not as cool. Near steady temperature in the mid 40s. South winds 5 to 10 mph.

Sunny. Not as cool with highs in the mid 60s. Southwest winds around 5 mph becoming northwest around 5 mph in the afternoon.

Partly cloudy in the evening then becoming mostly cloudy. Lows in the upper 40s. East winds around 5 mph.

Mostly cloudy. Highs in the lower 70s.

Partly cloudy. Not as cool with lows in the upper 50s.

Partly sunny. Highs in the mid 70s.

Mostly cloudy in the evening then becoming partly cloudy. Lows in the mid 50s.

Sunny. Highs in the upper 60s.

Mostly cloudy. Lows in the mid 40s. Highs in the lower 60s.

Mostly cloudy. Lows in the mid 40s. Highs in the lower 60s.

Mostly cloudy with a 20 percent chance of rain. Cooler with lows in the lower 30s.

Mostly sunny. Much cooler with highs in the lower 40s.

Partly cloudy. Low temperature around 40F. Dew point will be around 36F with an average humidity of 73%. Winds will be 4 mph from the N.

Mostly cloudy. High temperature around 51F. Dew point will be around 36F with an average humidity of 65%. Winds will be 3 mph from the NE.

Partly cloudy with a slight chance of rain. Chance of precipitation 25%. Low temperature around 42F. Dew point will be around 36F with an average humidity of 72%. Winds will be 3 mph from the SE.

Mostly cloudy with a slight chance of rain. Chance of precipitation 25%. High temperature around 53F. Dew point will be around 39F with an average humidity of 67%. Winds will be 3 mph from the SE.

Mostly cloudy. Low temperature around 43F. Dew point will be around 39F with an average humidity of 76%. Winds will be 1 mph from the S.