10-Day Weather Forecast - Lake Saint Louis, MO

Mostly sunny. A slight chance of showers and thunderstorms this afternoon. Highs in the upper 80s. Light and variable winds. Chance of rain 20 percent.

Mostly clear. A slight chance of showers and thunderstorms in the evening. Lows in the lower 70s. South winds around 5 mph. Chance of rain 20 percent.

Partly sunny. A chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Southwest winds around 5 mph. Chance of rain 40 percent. Heat index values up to 102.

Showers and thunderstorms. Humid with lows in the lower 70s. Southwest winds around 5 mph. Chance of rain 80 percent. Heat index values up to 101 early in the evening.

A chance of showers and thunderstorms in the morning then showers and thunderstorms likely in the afternoon. Humid with highs around 90. West winds around 5 mph. Chance of rain 70 percent. Heat index values up to 101.

Showers and thunderstorms likely. Lows in the lower 70s. Chance of rain 70 percent.

Mostly cloudy in the morning then becoming partly sunny. A chance of showers and thunderstorms. Highs in the upper 80s. Chance of rain 50 percent.

Partly cloudy with a chance of showers and thunderstorms. Lows in the lower 70s. Chance of rain 50 percent.

Mostly sunny. A chance of showers and thunderstorms mainly in the morning. Highs in the upper 80s. Chance of rain 30 percent.

Mostly clear. Lows around 70. Highs around 90.

Mostly clear. Lows around 70. Highs around 90.

Clear. Lows in the lower 70s.

Sunny. Highs in the lower 90s. Heat index values up to 100.

Clear. Low temperature around 74F. Dew point will be around 73F with an average humidity of 81%. Winds will be 2 mph from the E.

Sunny. High temperature around 90F. Dew point will be around 74F with an average humidity of 73%. Winds will be 4 mph from the E.

Clear with widely scattered thunderstorms. Chance of storms 25%. Low temperature around 73F. Dew point will be around 72F with an average humidity of 82%. Winds will be 3 mph from the E.

Sunny with widely scattered thunderstorms. Chance of storms 25%. High temperature around 89F. Dew point will be around 73F with an average humidity of 73%. Winds will be 2 mph from the E.

Clear with widely scattered thunderstorms. Chance of storms 30%. Low temperature around 71F. Dew point will be around 70F with an average humidity of 80%. Winds will be 3 mph from the NE.