10-Day Weather Forecast - Port Jefferson Station, NY

Partly sunny. A chance of thunderstorms with a slight chance of showers in the afternoon. Some thunderstorms may produce gusty winds and heavy rainfall in the afternoon. Humid with highs in the mid 80s. Southwest winds 10 to 15 mph. Chance of rain 30 percent.

Mostly cloudy. A slight chance of showers and thunderstorms. Some thunderstorms may produce gusty winds and heavy rainfall in the evening. Humid with lows in the lower 70s. Southwest winds 10 to 15 mph diminishing to around 5 mph after midnight. Chance of rain 20 percent.

Partly sunny. A chance of showers and thunderstorms in the afternoon. Some thunderstorms may produce gusty winds and heavy rainfall in the afternoon. Humid with highs in the upper 80s. West winds 5 to 10 mph. Gusts up to 20 mph in the afternoon. Chance of rain 40 percent. Heat index values in the upper 90s.

Mostly cloudy. A chance of showers and thunderstorms in the evening then a chance of thunderstorms with a slight chance of showers after midnight. Some thunderstorms may produce gusty winds and heavy rainfall. Humid with lows in the lower 70s. Northwest winds 5 to 10 mph. Chance of rain 40 percent.

Mostly sunny. Highs in the mid 80s.

Partly cloudy. Lows in the upper 60s.

Sunny. Highs in the mid 80s.

Mostly clear in the evening then becoming partly cloudy. Lows in the upper 60s.

Sunny. Highs in the mid 80s.

Mostly clear. Lows around 70.

Sunny. Highs in the upper 80s. Heat index values in the mid 90s in the afternoon.

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

Sunny. Highs in the lower 90s. Heat index values up to 100.

Clear with a slight chance of rain. Chance of precipitation 30%. Low temperature around 69F. Dew point will be around 64F with an average humidity of 74%. Winds will be 4 mph from the NW.

Sunny with a slight chance of rain. Chance of precipitation 25%. High temperature around 81F. Dew point will be around 64F with an average humidity of 67%. Winds will be 6 mph from the NW.

Clear. Low temperature around 67F. Dew point will be around 61F with an average humidity of 70%. Winds will be 5 mph from the NW.

Sunny. High temperature around 80F. Dew point will be around 62F with an average humidity of 65%. Winds will be 4 mph from the NW.

Clear. Low temperature around 68F. Dew point will be around 62F with an average humidity of 73%. Winds will be 2 mph from the W.