10-Day Weather Forecast - Harlingen, TX

Sunny, hot with highs around 100. Southeast winds 10 to 15 mph with gusts up to 30 mph. Heat index values up to 109.

Mostly clear. Humid with lows in the upper 70s. Southeast winds 10 to 15 mph with gusts up to 30 mph, diminishing to around 5 mph after midnight. Heat index values up to 105 early in the evening.

Sunny with highs in the upper 90s. East winds around 5 mph, increasing to 10 to 15 mph with gusts up to 25 mph in the afternoon. Heat index values up to 108.

Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 70s.

Mostly sunny with a chance of showers and thunderstorms. Highs in the mid 90s. Chance of rain 50 percent. Heat index values up to 110.

Mostly cloudy in the evening, then becoming partly cloudy. A chance of showers after midnight. Lows in the upper 70s. Chance of rain 50 percent. Heat index values up to 105 early in the evening.

Mostly sunny. A chance of showers and thunderstorms in the morning. Highs in the mid 90s. Chance of rain 50 percent. Heat index values up to 105.

Mostly clear. Lows in the mid 70s.

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

Mostly clear. Lows in the mid 70s.

Sunny. Highs in the upper 90s. Heat index values up to 110.

Mostly clear with widely scattered thunderstorms. Chance of storms 25%. Low temperature around 77F. Dew point will be around 74F with an average humidity of 81%. Winds will be 8 mph from the SE.

Partly cloudy with a 45% chance for rain and thunderstorms. High temperature around 95F. Dew point will be around 73F with an average humidity of 61%. Winds will be 5 mph from the E.

Clear with a 45% chance for rain and thunderstorms. Low temperature around 77F. Dew point will be around 74F with an average humidity of 80%. Winds will be 6 mph from the E.

Mostly sunny with a 45% chance for rain and thunderstorms. High temperature around 95F. Dew point will be around 72F with an average humidity of 60%. Winds will be 6 mph from the E.

Clear with a 50% chance for rain and thunderstorms. Low temperature around 77F. Dew point will be around 74F with an average humidity of 80%. Winds will be 7 mph from the E.

Mostly sunny with a 55% chance for rain and thunderstorms. High temperature around 95F. Dew point will be around 72F with an average humidity of 60%. Winds will be 7 mph from the E.

Partly cloudy with a 50% chance for rain and thunderstorms. Low temperature around 77F. Dew point will be around 74F with an average humidity of 80%. Winds will be 7 mph from the E.