, °F

Personalized Forecasts

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    • Today

      Dec 16

      38° /23°F
      Partial sunshine
      • Good
      • for stargazing
      • Cloud Cover: 29%
      • Precip: 12%
      • Hours of Precip: 0
    • Sun

      Dec 17

      36° /29°
      Some sun, then clouds
      • Poor
      • for stargazing
      • Cloud Cover: 98%
      • Precip: 65%
      • Hours of Precip: 4
      More
    • Mon

      Dec 18

      44° /37°
      Cloudy most of the time
      • Poor
      • for stargazing
      • Cloud Cover: 77%
      • Precip: 60%
      • Hours of Precip: 1
      More
    • Tue

      Dec 19

      52° /36°
      Times of clouds and sun
      • Very Good
      • for stargazing
      • Cloud Cover: 36%
      • Precip: 25%
      • Hours of Precip: 0
      More
    • Wed

      Dec 20

      42° /27°
      Partly sunny and windy
      • Very Good
      • for stargazing
      • Cloud Cover: 42%
      • Precip: 7%
      • Hours of Precip: 0
      More
    Saturday
    1pm
    2pm
    3pm
    4pm
    5pm
    6pm
    7pm
    8pm
    Forecast Partly Cloudy Partly Sunny Partly Sunny Partly Sunny Partly Cloudy Partly Cloudy Partly Cloudy Partly Cloudy
    Temp (°F) 37° 38° 38° 36° 35° 35° 35° 34°
    RealFeel® 27° 29° 28° 27° 26° 26° 27° 27°
    Wind (mph) 15 WSW 14 WSW 13 WSW 12 WSW 10 WSW 9 W 9 W 8 WNW
    precip
    1pm
    2pm
    3pm
    4pm
    5pm
    6pm
    7pm
    8pm
    Rain
    0%
    0%
    0%
    0%
    0%
    0%
    0%
    0%
    Snow
    5%
    5%
    5%
    5%
    5%
    3%
    0%
    0%
    Ice
    0%
    0%
    0%
    0%
    0%
    0%
    0%
    0%
    SKY
    1pm
    2pm
    3pm
    4pm
    5pm
    6pm
    7pm
    8pm
    UV Index 1 1 1 0 0 0 0 0
    Cloud Cover 65% 45% 45% 45% 45% 45% 45% 45%
    Humidity 48% 47% 47% 49% 52% 55% 55% 56%
    Dew Point 19° 20° 20° 19° 19° 20° 20° 20°
    Visibility 10 mi 10 mi 10 mi 10 mi 10 mi 10 mi 10 mi 10 mi
    Temp °F
    1pm
    2pm
    3pm
    4pm
    5pm
    6pm
    7pm
    8pm
    40° 35° 30°

    Temperature History

    more Historical Weather Data >
      Today Normal Record 12/16/2016
    High 38° 43° 56° (2011) 28°
    Low 23° 28° 10° (1988) 17°

    Sunrise/Sunset

    • Sunrise: 7:10 AM
    • Sunset: 4:26 PM
    • Duration: 9:16 hr

    Moonrise/Moonset

    • Moonrise: 5:25 AM
    • Moonset: 3:42 PM
    • Duration: 10:17 hr
    Astronomy

    Solunar Information for Holtsville, NY

    Mon, Dec 18
    New
    Tue, Dec 26
    First
    Tue, Jan 2
    Full
    Mon, Jan 8
    Last

    Sat. Stargazing