10-Day Weather Forecast - Saint Charles, MO

Mostly cloudy. Highs around 40. South winds 5 to 10 mph.

Mostly cloudy in the evening then becoming partly cloudy. Not as cool with lows in the upper 20s. West winds 5 to 10 mph.

Mostly sunny. Highs in the upper 40s. West winds 10 to 15 mph becoming northwest in the afternoon.

Partly cloudy. Lows in the mid 20s. North winds 5 to 10 mph.

Mostly sunny. Cooler with highs in the upper 30s. Northeast winds around 5 mph becoming southeast in the afternoon.

Mostly cloudy. Lows in the upper 20s.

Mostly sunny. Not as cool with highs in the mid 50s.

Mostly clear. Lows in the lower 30s. Highs around 60.

Mostly clear. Lows in the lower 30s. Highs around 60.

Mostly clear. Not as cool with lows in the lower 40s.

Mostly sunny in the morning then becoming mostly cloudy. A 20 percent chance of rain. Highs in the mid 60s.

Mostly cloudy with a 40 percent chance of rain. Lows in the lower 40s. Highs in the mid 50s.

Mostly cloudy with a 40 percent chance of rain. Lows in the lower 40s. Highs in the mid 50s.

Partly cloudy. Low temperature around 42F. Dew point will be around 36F with an average humidity of 70%. Winds will be 2 mph from the SE.

Cloudy with a slight chance of rain. Chance of precipitation 30%. High temperature around 51F. Dew point will be around 36F with an average humidity of 64%. Winds will be 1 mph from the SE.

Cloudy with a chance of rain. Chance of precipitation 40%. Low temperature around 41F. Dew point will be around 36F with an average humidity of 74%. Winds will be 2 mph from the E.

Cloudy with a slight chance of rain. Chance of precipitation 30%. High temperature around 52F. Dew point will be around 37F with an average humidity of 65%. Winds will be 1 mph from the E.

Cloudy with a slight chance of rain. Chance of precipitation 25%. Low temperature around 40F. Dew point will be around 35F with an average humidity of 71%. Winds will be 1 mph from the NE.