10-Day Weather Forecast - Festus, MO

Mostly sunny. Isolated showers and thunderstorms in the morning. Humid with highs around 90. South winds around 5 mph, becoming west around 5 mph in the afternoon. Chance of rain 20 percent. Heat index values up to 101 in the afternoon.

Partly cloudy in the evening, then clearing. Lows in the mid 60s. Northwest winds around 5 mph.

Sunny. Highs in the mid 80s. Northwest winds around 5 mph.

Mostly clear. Lows in the lower 60s. North winds around 5 mph in the evening, becoming light and variable.

Mostly clear. Highs in the mid 80s.

Mostly clear. Lows in the lower 60s.

Mostly clear. Highs in the mid 80s.

Mostly clear. Lows in the lower 60s.

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

Mostly clear. Lows in the lower 70s. Heat index values up to 100.

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

Mostly clear. Lows in the lower 70s. Heat index values up to 100.

Mostly sunny. Highs in the mid 90s. Heat index values up to 105.

Clear with widely scattered thunderstorms. Chance of storms 25%. Low temperature around 72F. Dew point will be around 71F with an average humidity of 75%. Winds will be 2 mph from the SW.

Sunny with widely scattered thunderstorms. Chance of storms 30%. High temperature around 89F. Dew point will be around 70F with an average humidity of 67%. Winds will be 1 mph from the S.

Mostly clear with a 40% chance for rain and thunderstorms. Low temperature around 71F. Dew point will be around 70F with an average humidity of 77%. Winds will be 1 mph from the S.

Partly cloudy with a 30% chance for rain and thunderstorms. High temperature around 88F. Dew point will be around 70F with an average humidity of 69%. Winds will be 0 mph from the S.

Partly cloudy with widely scattered thunderstorms. Chance of storms 25%. Low temperature around 69F. Dew point will be around 67F with an average humidity of 76%. Winds will be 0 mph from the SW.