10-Day Weather Forecast - Sunnyvale, TX

Mostly sunny. A 40 percent chance of showers and thunderstorms in the afternoon. Highs in the upper 90s. South winds around 5 mph.

Mostly clear. Lows in the upper 70s. Southeast winds around 5 mph.

Sunny hot with highs in the upper 90s. South winds 5 to 10 mph. Heat index values up to 105.

Mostly clear. Lows in the lower 80s. South winds 5 to 10 mph.

Sunny hot with highs around 100. Heat index values up to 105.

Clear. Lows in the upper 70s.

Sunny hot with highs around 100. Heat index values up to 105.

Mostly clear. Lows around 80.

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

Mostly clear. Lows in the upper 70s.

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

Partly cloudy with a 20 percent chance of showers and thunderstorms in the evening then mostly clear after midnight. Lows in the upper 70s.

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

Partly cloudy with a 65% chance for rain and thunderstorms. Low temperature around 80F. Dew point will be around 73F with an average humidity of 69%. Winds will be 4 mph from the S.

Sunny with numerous thunderstorms. Chance of storms 65%. High temperature around 96F. Dew point will be around 73F with an average humidity of 58%. Winds will be 2 mph from the E.

Clear with scattered thunderstorms. Chance of storms 55%. Low temperature around 79F. Dew point will be around 71F with an average humidity of 62%. Winds will be 3 mph from the SE.

Sunny with scattered thunderstorms. Chance of storms 60%. High temperature around 97F. Dew point will be around 71F with an average humidity of 53%. Winds will be 4 mph from the E.

Clear with scattered thunderstorms. Chance of storms 60%. Low temperature around 79F. Dew point will be around 71F with an average humidity of 60%. Winds will be 4 mph from the E.