10-Day Weather Forecast - Marthasville, MO

Sunny, hot with highs in the upper 90s. Southwest winds around 5 mph. Heat index values up to 105.

Mostly clear. Lows in the mid 70s. Light and variable winds. Heat index values up to 104 early in the evening.

Sunny, hot with highs in the upper 90s. West winds around 5 mph. Heat index values up to 105.

Mostly clear. Lows in the lower 70s. Light and variable winds. Heat index values up to 102 early in the evening.

Mostly clear. Highs in the mid 90s. Heat index values up to 100.

Mostly clear. Lows in the upper 60s. Heat index values up to 100.

Mostly clear. Highs in the mid 90s. Heat index values up to 100.

Mostly clear. Lows in the upper 60s. Heat index values up to 100.

Mostly clear. Highs in the mid 90s. Heat index values up to 100.

Mostly clear. Hot. Lows in the mid 70s. Heat index values up to 105.

Mostly clear. Hot. Highs in the upper 90s. Heat index values up to 105.

Mostly clear. A slight chance of showers and thunderstorms after midnight. Lows in the lower 70s. Chance of rain 20 percent. Heat index values up to 100 early in the evening.

Mostly sunny. A slight chance of showers and thunderstorms in the morning. Highs in the lower 90s. Chance of rain 20 percent.

Clear. Low temperature around 75F. Dew point will be around 71F with an average humidity of 76%. Winds will be 2 mph from the SW.

Sunny. High temperature around 90F. Dew point will be around 71F with an average humidity of 64%. Winds will be 2 mph from the SW.

Clear. Low temperature around 71F. Dew point will be around 71F with an average humidity of 81%. Winds will be 2 mph from the SE.

Mostly sunny. High temperature around 91F. Dew point will be around 71F with an average humidity of 67%. Winds will be 3 mph from the S.

Clear with a slight chance of rain. Chance of precipitation 25%. Low temperature around 70F. Dew point will be around 69F with an average humidity of 79%. Winds will be 2 mph from the SE.