• Today

    Jul 27

    88°Lo 71°

    Mostly sunny

    Beneficial weather for migraines
    • Hi
      RealFeel
      95°
    • UV
      5 - High
    • Cloud
      Cover
      23%
    more
  • Thu

    Jul 28

    89°Lo 73°

    Humid with clouds and sun

    Beneficial weather for migraines
    • Hi
      RealFeel
      99°
    • UV
      5 - High
    • Cloud
      Cover
      38%
  • Fri

    Jul 29

    79°Lo 68°

    A couple of thunderstorms

    Beneficial weather for migraines
    • Hi
      RealFeel
      88°
    • UV
      4 - Moderate
    • Cloud
      Cover
      76%
    more
  • Sat

    Jul 30

    83°Lo 68°

    Humid with clouds and sun

    Beneficial weather for migraines
    • Hi
      RealFeel
      92°
    • UV
      5 - High
    • Cloud
      Cover
      50%
    more
  • Sun

    Jul 31

    81°Lo 70°

    Mostly cloudy with a t-storm

    Beneficial weather for migraines
    • Hi
      RealFeel
      89°
    • UV
      4 - Moderate
    • Cloud
      Cover
      87%
    more
Next Previous
Hi 89° RealFeel® 99° Precipitation 25%

Day

N

E

S

W

  • S 7 mph
  • Gusts: 12 mph

Humid with intervals of clouds and sunshine

  • Max UV Index: 7 (High)
  • Thunderstorms: 20%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs
Lo 73° RealFeel® 78° Precipitation 25%

Night

N

E

S

W

  • SE 5 mph
  • Gusts: 9 mph

Partly cloudy and humid

  • Max UV Index: N/A
  • Thunderstorms: 20%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs

Temperature History - Jul 28

more Historical Weather Data >
  Today Normal Record 7/28/2015
High 89° 82° 96° (1999) 88°
Low 73° 66° 56° (2001) 73°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 5:45 AM with 14:26 of sunlight, then sets at 8:11 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 1:03 AM with 14:14 of moolight, then sets at 3:17 PM

Holtsville Weather Report

Heat wave to deteriorate across northeastern US as downpours unleash up to 2 inches of rain

July 27, 2016; 1:23 PM ET

As July draws to a close, a storm system swinging up from the Deep South will bring downpours to the northeastern U.S. and break the back of an extended heat wave. more >

Thu. Migraine Headache

Thu. UV Index