10-Day Weather Forecast - Saint Charles, MO

Mostly cloudy with a chance of sprinkles and flurries in the morning then mostly sunny in the afternoon. Much cooler with highs in the upper 30s. Temperature falling into the lower 30s in the afternoon. Northwest winds 15 to 20 mph with gusts up to 30 mph.

Clear. Much cooler with lows around 17. Northwest winds 10 to 15 mph with gusts up to 25 mph.

Sunny. Highs in the lower 30s. Northwest winds 5 to 10 mph becoming southwest in the afternoon.

Mostly cloudy. A chance of snow mainly in the evening. Not as cool with lows in the upper 20s. Temperature rising into the lower 30s after midnight. Southwest winds 10 to 15 mph with gusts up to 25 mph. Chance of snow 40 percent.

Mostly cloudy. Highs in the mid 40s. Lows around 20.

Mostly cloudy. Highs in the mid 40s. Lows around 20.

Partly sunny. Much cooler with highs in the mid 20s. Wind chill values as low as 5 above.

Partly cloudy. Lows around 10 above. Highs in the lower 30s. Wind chill values as low as 5 below.

Partly cloudy. Lows around 10 above. Highs in the lower 30s. Wind chill values as low as 5 below.

Partly cloudy in the evening then becoming mostly clear. Lows 15 to 20. Wind chill values as low as 5 above.

Mostly clear. Highs in the mid 30s. Lows around 10 above. Wind chill values as low as zero.

Mostly clear. Highs in the mid 30s. Lows around 10 above. Wind chill values as low as zero.

Mostly sunny. Highs in the lower 30s. Wind chill values as low as zero in the morning.

Mostly clear. Low temperature around 27F. Dew point will be around 14F with an average humidity of 55%. Winds will be 6 mph from the SE.

Mostly sunny. High temperature around 42F. Dew point will be around 24F with an average humidity of 58%. Winds will be 8 mph from the SE.

Mostly cloudy with a slight chance of rain. Chance of precipitation 25%. Low temperature around 32F. Dew point will be around 27F with an average humidity of 73%. Winds will be 5 mph from the E.

Cloudy with a chance of rain. Chance of precipitation 35%. High temperature around 42F. Dew point will be around 30F with an average humidity of 70%. Winds will be 8 mph from the E.

Cloudy with a chance of rain. Chance of precipitation 45%. Low temperature around 36F. Dew point will be around 33F with an average humidity of 80%. Winds will be 5 mph from the SE.