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    Next 5 Days
    • Current Weather

      13° F
      Sunny
      • Ragweed Pollen
        • Ragweed Pollen
        • Grass Pollen
        • Tree Pollen
        • Mold
        • Dust & Dander
        • Air Quality Index
      • Relative Humidity: 64%
      • Yesterday Temp: 24°
      • RealFeel: 12°
    • Today

      Jan 17

      15° Hi
      Frigid; afternoon flurries
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Low
      } Day Details
    • Tomorrow

      Jan 18

      27° Hi
      Mostly sunny and breezy
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Low
      } Day Details
    • Friday

      Jan 19

      34° Hi
      Sunshine and breezy
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Low
      } Day Details
    Next 6 Hours
    • 2PM

      Jan 17

      14°
      Intermittent clouds
      Precip 36%
    • 3PM

      15°
      Intermittent clouds
      Precip 33%
    • 4PM

      15°
      Intermittent clouds
      Precip 33%
    • 5PM

      15°
      Intermittent clouds
      Precip 36%
    • 6PM

      13°
      Mostly cloudy w/ flurries
      Precip 40%
    • 7PM

      12°
      Partly cloudy
      Precip 6%

    Castle Shannon Pollen Levels Jan 17

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

      Low

    • Ragweed Pollen

      Low

    • Mold

      Low

    • Grass Pollen

      Low

    Parts of the mid-Atlantic and New England will receive snow that could cause travel disruptions.
    Snow to blanket mid-Atlantic, New England

    Allergies Live Feed

    Wed. Pollen

    Wed. Dust & Dander

    Wed. Wind Maps