10-Day Weather Forecast - McKinney, TX

Mostly sunny. A 20 percent chance of showers and thunderstorms in the afternoon. Hot with highs around 101. Southwest winds 5 to 10 mph, becoming northwest in the afternoon.

Partly cloudy. A 20 percent chance of showers and thunderstorms after midnight. Lows in the upper 70s. North winds around 5 mph.

Mostly sunny. Hot with highs in the upper 90s. Northeast winds 5 to 10 mph. Heat index values up to 107.

Partly cloudy in the evening, then clearing. Lows in the mid 70s. Northeast winds 5 to 10 mph.

Sunny, hot with highs in the upper 90s.

Mostly clear. Lows in the mid 70s.

Sunny, hot with highs in the upper 90s. Heat index values up to 105.

Clear. Lows in the mid 70s.

Sunny, hot with highs in the upper 90s. Heat index values up to 105.

Clear. Lows in the upper 70s.

Sunny, hot with highs in the upper 90s. Heat index values up to 105.

Mostly clear. Lows in the upper 70s.

Sunny, hot with highs in the upper 90s. Heat index values up to 110 in the afternoon.

Clear. Low temperature around 80F. Dew point will be around 67F with an average humidity of 53%. Winds will be 6 mph from the S.

Mostly sunny. High temperature around 97F. Dew point will be around 70F with an average humidity of 53%. Winds will be 5 mph from the S.

Partly cloudy. Low temperature around 79F. Dew point will be around 67F with an average humidity of 52%. Winds will be 6 mph from the SE.

Sunny. High temperature around 96F. Dew point will be around 69F with an average humidity of 53%. Winds will be 5 mph from the SE.

Mostly clear. Low temperature around 78F. Dew point will be around 66F with an average humidity of 54%. Winds will be 5 mph from the SE.