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  • Fri

    Sep 18

    Mostly cloudy 71°Lo 57°
    more
  • Sat

    Sep 19

    Partial sunshine 71°Lo 59°
    more
  • Sun

    Sep 20

    Clouds and sun 70°Lo 57°
    more
  • Mon

    Sep 21

    Abundant sunshine 69°Lo 57°
  • Tue

    Sep 22

    Turning cloudy 72°Lo 55°
    more
Hi 69° RealFeel® 75° Precipitation 5%

Day

N

E

S

W

  • SSE 5 mph
  • Gusts: 12 mph

Abundant sunshine

  • Max UV Index: 5 (Moderate)
  • Thunderstorms: 0%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs
Lo 57° RealFeel® 57° Precipitation 10%

Night

N

E

S

W

  • SSW 5 mph
  • Gusts: 8 mph

Clear to partly cloudy

  • Max UV Index: N/A
  • Thunderstorms: 0%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs

Temperature History - Sep 21

more Historical Weather Data >
  Today Normal Record 9/21/2014
High 69° 72° 82° (1989) 76°
Low 57° 55° 43° (1991) 67°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:38 AM with 12:14 of sunlight, then sets at 6:52 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 2:10 PM with 10:09 of moolight, then sets at 12:19 AM

Port Jefferson Weather Report

NYC: Heat to Rebuild Labor Day Weekend After Cooldown

September 3, 2015; 11:58 AM ET

A backdoor front will trim temperatures, haze and humidity around New York City early this weekend before all three conditions build by early next week. more >