, °F

Personalized Forecasts

Featured Forecast

My Favorite Forecasts

    My Recent Locations

    • Early AM

      May 21

      57° Lo
      Partly cloudy
      • Ragweed Pollen
        • Ragweed Pollen
        • Grass Pollen
        • Tree Pollen
        • Mold
        • Dust & Dander
        • Air Quality Index
      • Ragweed Pollen
      • Weather
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: High
      More
    • Today

      May 21

      74° /53°F
      Mostly sunny; less humid
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: High
    • Tue

      May 22

      65° /58°
      A shower; cooler
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Moderate
      More
    • Wed

      May 23

      77° /58°
      Partly sunny
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Moderate
      More
    • Thu

      May 24

      72° /56°
      Plenty of sunshine; pleasant
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Low
      More

    Day

    74°Hi RealFeel® 81° Precipitation 2%
    Mostly sunny; less humid
    • Winds from the
    • W 7 mph
    • Gusts: 12 mph
    • Max UV Index: 10 (Extreme)
    • Thunderstorms: 0%
    • Precipitation: 0 in
    • Rain: 0 in
    • Snow: 0 in
    • Ice: 0 in
    • Hours of Precipitation: 0 hrs
    • Hours of Rain: 0 hrs

    Night

    53°Lo RealFeel® 53° Precipitation 18%
    Increasing clouds
    • Winds from the
    • S 5 mph
    • Gusts: 12 mph
    • Max UV Index: N/A
    • Thunderstorms: 2%
    • Precipitation: 0 in
    • Rain: 0 in
    • Snow: 0 in
    • Ice: 0 in
    • Hours of Precipitation: 0 hrs
    • Hours of Rain: 0 hrs

    Stony Brook Pollen Levels May 21

    • Extreme
    • Very High
    • High
    • Moderate
    • Low
    • Tree Pollen

      High

    • Ragweed Pollen

      Low

    • Mold

      Low

    • Grass Pollen

      Low

    Temperature History

    more Historical Weather Data >
      Today Normal Record 5/21/2017
    High 74° 69° 90° (1996) 65°
    Low 53° 51° 39° (2002) 43°

    Sunrise/Sunset

    • Sunrise: 5:31 AM
    • Sunset: 8:08 PM
    • Duration: 14:37 hr

    Moonrise/Moonset

    • Moonrise: 10:42 AM
    • Moonset: 1:18 AM
    • Duration: 14:36 hr
    Astronomy

    Mon. Pollen

    Mon. Dust & Dander

    Mon. Wind Maps