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    • Early AM

      Aug 21

      68° Lo
      Mainly clear
      • 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

      Aug 21

      89° /72°F
      A thunderstorm this afternoon
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Low
    • Tue

      Aug 22

      91° /73°
      Humid with sunny intervals
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Low
      More
    • Wed

      Aug 23

      81° /61°
      Not as warm; an a.m. t-storm
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Low
      More
    • Thu

      Aug 24

      78° /57°
      Sunshine and pleasant
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Low
      More

    Day

    89°Hi RealFeel® 100° Precipitation 51%
    Sunny to partly cloudy with a thunderstorm this afternoon
    • Winds from the
    • S 5 mph
    • Gusts: 7 mph
    • Max UV Index: 11 (Extreme)
    • Thunderstorms: 90%
    • Precipitation: 0.05 in
    • Rain: 0.05 in
    • Snow: 0 in
    • Ice: 0 in
    • Hours of Precipitation: 0.5 hrs
    • Hours of Rain: 0.5 hrs

    Night

    72°Lo RealFeel® 75° Precipitation 55%
    A shower or thunderstorm early on this evening; mainly clear and humid
    • Winds from the
    • S 5 mph
    • Gusts: 7 mph
    • Max UV Index: N/A
    • Thunderstorms: 60%
    • Precipitation: 0.05 in
    • Rain: 0.05 in
    • Snow: 0 in
    • Ice: 0 in
    • Hours of Precipitation: 0.5 hrs
    • Hours of Rain: 0.5 hrs

    Rockville Pollen Levels Aug 21

    • 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 8/21/2016
    High 89° 83° N/A 86°
    Low 72° 67° N/A 68°

    Sunrise/Sunset

    • Sunrise: 6:27 AM
    • Sunset: 7:56 PM
    • Duration: 13:29 hr

    Moonrise/Moonset

    • Moonrise: 6:10 AM
    • Moonset: 8:01 PM
    • Duration: 13:51 hr
    Astronomy

    Mon. Pollen

    Mon. Dust & Dander

    Mon. Wind Maps