• Tonight

    Sep 20

    Lo 68°

    Mostly cloudy, a shower late

    Lawn Mowing Weather
    • Hours of Precip
      0.5
    • Precip
      4%
    • Hi
      RealFeel
      71°
    more
  • Sun

    Sep 21

    79°Lo 64°

    Humid with clouds breaking

    Very Good for lawn mowing
    • Hours of Precip
      1
    • Precip
      40%
    • Hi
      RealFeel
      84°
  • Mon

    Sep 22

    75°Lo 52°

    Mostly sunny and breezy

    Very Good for lawn mowing
    • Hours of Precip
      0
    • Precip
      15%
    • Hi
      RealFeel
      75°
    more
  • Tue

    Sep 23

    71°Lo 58°

    Mostly sunny and pleasant

    Excellent for lawn mowing
    • Hours of Precip
      0
    • Precip
      2%
    • Hi
      RealFeel
      70°
    more
  • Wed

    Sep 24

    71°Lo 57°

    Sunny and pleasant

    Excellent for lawn mowing
    • Hours of Precip
      0
    • Precip
      6%
    • Hi
      RealFeel
      71°
    more
Next Previous
Hi 79° RealFeel® 84° Precipitation 40%

Day

N

E

S

W

  • S 5 mph
  • Gusts: 11 mph

A morning shower in spots; otherwise, humid with clouds giving way to some sun

  • Max UV Index: 4 (Moderate)
  • Thunderstorms: 20%
  • Precipitation: 0.01 in
  • Rain: 0.01 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0.5 hrs
  • Hours of Rain: 0.5 hrs
Lo 64° RealFeel® 60° Precipitation 55%

Night

N

E

S

W

  • WSW 9 mph
  • Gusts: 13 mph

An evening shower or thunderstorm around; otherwise, patchy clouds

  • Max UV Index: N/A
  • Thunderstorms: 40%
  • Precipitation: 0.05 in
  • Rain: 0.05 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0.5 hrs
  • Hours of Rain: 0.5 hrs

Temperature History - Sep 21

more Historical Weather Data >
  Today Normal Record 9/21/2013
High 79° 74° 83° (2004) 75°
Low 64° 59° 42° (1962) 57°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:41 AM with 12:13 of sunlight, then sets at 6:54 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 4:12 AM with 13:17 of moolight, then sets at 5:29 PM

Top Story

Rockville Centre Weather Report

NYC: September Temperature Roller Coaster to Continue

September 20, 2014; 1:20 PM ET

In keeping with tradition, temperatures will continue their up-and-down cycle during the second half of September around New York City. more >

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Sep 20, 2011; 5:00 AM ET Why do leaves change from green to beautiful shades of red, orange and yellow in the fall?

Sun. Overnight Freeze

Sun. Degree Days

Sun. Evapotranspiration