10-Day Weather Forecast - Saint Charles, MO

A slight chance of thunderstorms in the morning. Partly sunny with a slight chance of showers. Not as cool with highs in the upper 70s. South winds 15 to 20 mph with gusts up to 35 mph. Chance of rain 20 percent.

Mostly cloudy with a chance of thunderstorms. A chance of showers in the evening then showers after midnight. Lows in the upper 50s. South winds 10 to 15 mph with gusts up to 30 mph. Chance of rain 90 percent.

Mostly cloudy with a chance of showers in the morning then partly sunny with a slight chance of showers in the afternoon. Cooler with highs in the upper 60s. Temperature falling to around 60 in the afternoon. West winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 50 percent.

Mostly cloudy in the evening then clearing. Much cooler with lows around 40.

Mostly clear. Highs in the mid 60s. Lows in the upper 40s.

Mostly clear. Highs in the mid 60s. Lows in the upper 40s.

Sunny. Not as cool with highs in the mid 70s.

Mostly clear with a slight chance of showers and thunderstorms in the evening then partly cloudy with a chance of showers and thunderstorms after midnight. Not as cool with lows in the upper 50s. Chance of rain 40 percent.

A chance of thunderstorms. Showers. Highs in the upper 70s. Chance of rain 80 percent.

A slight chance of thunderstorms in the evening. Showers. Lows in the lower 50s. Chance of rain 90 percent.

Mostly cloudy. Showers likely mainly in the morning. Much cooler with highs in the lower 60s. Chance of rain 70 percent.

Partly cloudy. Low temperature around 34F. Dew point will be around 30F with an average humidity of 67%. Winds will be 9 mph from the N.

Sunny. High temperature around 49F. Dew point will be around 27F with an average humidity of 51%. Winds will be 6 mph from the N.

Clear. Low temperature around 38F. Dew point will be around 28F with an average humidity of 60%. Winds will be 5 mph from the S.

Mostly sunny. High temperature around 59F. Dew point will be around 39F with an average humidity of 59%. Winds will be 9 mph from the SW.

Mostly clear. Low temperature around 41F. Dew point will be around 36F with an average humidity of 63%. Winds will be 5 mph from the W.

Cloudy. High temperature around 55F. Dew point will be around 36F with an average humidity of 57%. Winds will be 3 mph from the N.

Partly cloudy with a slight chance of rain. Chance of precipitation 25%. Low temperature around 40F. Dew point will be around 33F with an average humidity of 67%. Winds will be 2 mph from the E.