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    • Tonight

      Sep 25

      53° Lo F
      Mainly clear
      • Ragweed Pollen
        • Ragweed Pollen
        • Grass Pollen
        • Tree Pollen
        • Mold
        • Dust & Dander
        • Air Quality Index
      • Ragweed Pollen
      • Weather
      • Grass Pollen: Low
      • Ragweed Pollen: Moderate
      • Tree Pollen: Low
    • Mon

      Sep 26

      71° /59°
      Variable cloudiness
      • Moderate
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Moderate
      • Tree Pollen: Low
      More
    • Tue

      Sep 27

      72° /51°
      Mostly sunny
      • Moderate
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Moderate
      • Tree Pollen: Low
      More
    • Wed

      Sep 28

      74° /59°
      Chance of a little p.m. rain
      • Moderate
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Moderate
      • Tree Pollen: Low
      More
    • Thu

      Sep 29

      66° /58°
      Mostly cloudy, a little rain
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Low
      More

    Day

    72°Hi RealFeel® 75° Precipitation 5%
    Pleasant with times of clouds and sun
    • E 5 mph
    • Gusts: 10 mph
    • Max UV Index: 4 (Moderate)
    • Thunderstorms: 2%
    • 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 14%
    Mainly clear
    • SSE 4 mph
    • Gusts: 6 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 Sep 25

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

      Low

    • Ragweed Pollen

      Moderate

    • Mold

      Low

    • Grass Pollen

      Low

    Temperature History

    more Historical Weather Data >
      Today Normal Record 9/25/2015
    High 72° 72° N/A 70°
    Low 53° 56° N/A 55°

    Sunrise/Sunset

    • Sunrise: 7:00 AM
    • Sunset: 7:00 PM
    • Duration: 12:00 hr

    Moonrise/Moonset

    • Moonrise: 1:40 AM
    • Moonset: 4:02 PM
    • Duration: 14:22 hr
    Astronomy

    Rockville Weather Report

    Crisp fall air to bring first frost of season to parts of northeastern US

    September 25, 2016; 6:29 PM ET

    Fall air has finally arrived in the northeastern United States and may yield the first frost of the season in parts of the region to end this weekend. More >

    Sun. Pollen

    Sun. Dust & Dander

    Sun. Wind Maps