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    • Early AM

      Dec 11

      27° Lo
      Partly to mostly 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: Low
      More
    • Today

      Dec 11

      43° /32°
      Partial sunshine
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Low
      More
    • Tue

      Dec 12

      46° /20°F
      Mostly cloudy
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Low
    • Wed

      Dec 13

      31° /20°
      Partly sunny and windy
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Low
      More
    • Thu

      Dec 14

      35° /25°
      A couple of flurries possible
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Low
      More

    Day

    46°Hi RealFeel® 40° Precipitation 25%
    Mostly cloudy
    • Winds from the
    • WSW 9 mph
    • Gusts: 17 mph
    • Max UV Index: 1 (Low)
    • Thunderstorms: 1%
    • Precipitation: 0 in
    • Rain: 0 in
    • Snow: 0 in
    • Ice: 0 in
    • Hours of Precipitation: 0 hrs
    • Hours of Rain: 0 hrs

    Night

    20°Lo RealFeel® 10° Precipitation 10%
    Mostly clear and colder
    • Winds from the
    • WNW 12 mph
    • Gusts: 16 mph
    • Max UV Index: N/A
    • Thunderstorms: 1%
    • Precipitation: 0 in
    • Rain: 0 in
    • Snow: 0 in
    • Ice: 0 in
    • Hours of Precipitation: 0 hrs
    • Hours of Rain: 0 hrs

    Rockville Pollen Levels Dec 12

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

      Low

    • Ragweed Pollen

      Low

    • Mold

      Low

    • Grass Pollen

      Low

    Temperature History

    more Historical Weather Data >
      Today Normal Record 12/12/2016
    High 46° 44° N/A 52°
    Low 20° 31° N/A 37°

    Sunrise/Sunset

    • Sunrise: 7:18 AM
    • Sunset: 4:46 PM
    • Duration: 9:28 hr

    Moonrise/Moonset

    • Moonrise: 1:47 AM
    • Moonset: 1:51 PM
    • Duration: 12:04 hr
    Astronomy

    Tue. Pollen

    Tue. Dust & Dander

    Tue. Wind Maps