10-Day Weather Forecast - Port Arthur, TX

Mostly sunny with a slight chance of showers and thunderstorms. Humid with highs in the lower 90s. Southwest winds 5 to 10 mph. Chance of rain 20 percent. Heat index values up to 106.

Partly cloudy in the evening then becoming mostly clear. Humid with lows in the upper 70s. Southwest winds 5 to 10 mph.

Mostly sunny. Humid with highs in the lower 90s. Southwest winds 5 to 10 mph. Heat index values up to 105.

Mostly clear. Humid with lows around 80. South winds 5 to 10 mph.

Mostly sunny. A chance of showers and thunderstorms in the morning. Highs in the lower 90s. Chance of rain 40 percent. Heat index values up to 105.

Partly cloudy in the evening then clearing. Lows in the lower 80s.

Mostly sunny with a chance of showers and thunderstorms. Highs in the lower 90s. Chance of rain 50 percent. Heat index values up to 105.

Mostly cloudy in the evening then becoming partly cloudy. Lows around 80.

Mostly sunny with a chance of thunderstorms. Showers likely mainly in the morning. Highs around 90. Chance of rain 60 percent. Heat index values up to 105.

Mostly cloudy in the evening then becoming partly cloudy. Lows around 80.

Mostly sunny with a chance of showers and thunderstorms. Highs around 90. Chance of rain 50 percent. Heat index values up to 105.

Partly cloudy. A chance of showers after midnight. Lows in the upper 70s. Chance of rain 30 percent.

Mostly sunny with a chance of showers and thunderstorms. Highs in the lower 90s. Chance of rain 50 percent. 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 74F with an average humidity of 77%. Winds will be 3 mph from the SW.

Sunny with a 60% chance for rain and thunderstorms. High temperature around 88F. Dew point will be around 74F with an average humidity of 70%. Winds will be 2 mph from the S.

Partly cloudy with a 65% chance for rain and thunderstorms. Low temperature around 80F. Dew point will be around 74F with an average humidity of 76%. Winds will be 3 mph from the S.

Mostly sunny with a 50% chance for rain and thunderstorms. High temperature around 86F. Dew point will be around 75F with an average humidity of 75%. Winds will be 3 mph from the S.

Partly cloudy with a 45% chance for rain and thunderstorms. Low temperature around 80F. Dew point will be around 75F with an average humidity of 80%. Winds will be 4 mph from the S.