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    • Today

      Sep 30

      60° /58°F
      Windy with rain and drizzle
      • Ragweed Pollen
        • Ragweed Pollen
        • Grass Pollen
        • Tree Pollen
        • Mold
        • Dust & Dander
        • Air Quality Index
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Low
    • Sat

      Oct 1

      65° /59°
      Mostly cloudy, a little rain
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Low
      More
    • Sun

      Oct 2

      68° /60°
      Cloudy with a shower or two
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Low
      More
    • Mon

      Oct 3

      69° /59°
      Mostly cloudy, showers around
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Low
      More
    • Tue

      Oct 4

      66° /56°
      Mostly cloudy
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Low
      More
    Friday
    1pm
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    Forecast Rain Rain Cloudy Cloudy Rain Rain Cloudy Rain
    Temp (°F) 59° 59° 59° 60° 59° 59° 59° 58°
    RealFeel® 49° 50° 54° 54° 50° 50° 52° 49°
    Wind (mph) 21 NE 18 NE 17 NE 16 NE 15 NE 15 NE 15 NE 15 NE
    precip
    1pm
    2pm
    3pm
    4pm
    5pm
    6pm
    7pm
    8pm
    Rain
    58%
    54%
    49%
    49%
    62%
    62%
    49%
    58%
    Snow
    0%
    0%
    0%
    0%
    0%
    0%
    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 1 0 0 0 0
    Cloud Cover 100% 100% 100% 100% 100% 100% 100% 100%
    Humidity 92% 94% 94% 94% 96% 96% 95% 95%
    Dew Point 56° 57° 58° 58° 58° 58° 57° 57°
    Temp °F
    1pm
    2pm
    3pm
    4pm
    5pm
    6pm
    7pm
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    65° 60° 55°

    Temperature History

    more Historical Weather Data >
      Today Normal Record 9/30/2015
    High 60° 69° 82° (1986) 75°
    Low 58° 51° 40° (2000) 61°

    Sunrise/Sunset

    • Sunrise: 6:48 AM
    • Sunset: 6:35 PM
    • Duration: 11:47 hr

    Moonrise/Moonset

    • Moonrise: 6:18 AM
    • Moonset: 6:38 PM
    • Duration: 12:20 hr
    Astronomy

    Holtsville Weather Report

    Persistent rain to raise flood risk in part of northeastern US

    September 30, 2016; 4:16 AM ET

    Persistent downpours will raise the flood risk in part of the mid-Atlantic into Friday night, while rain will spread over the balance of the northeastern United States into the weekend. More >

    Fri. Pollen

    Fri. Dust & Dander

    Fri. Wind Maps