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    • Today

      Sep 29

      69° /62°F
      Heavy rain and a thunderstorm
      • Driving
        • Driving
        • Fuel Economy
      • Fair
      • for driving
      • Precip: 85%
      • Hours of Precip: 11.5
      • Rain: 1.51 in
    • Fri

      Sep 30

      66° /63°
      Cloudy with showers around
      • Good
      • for driving
      • Precip: 73%
      • Hours of Precip: 6
      • Rain: 0.39 in
      More
    • Sat

      Oct 1

      73° /60°
      Warmer with a passing shower
      • Very Good
      • for driving
      • Precip: 55%
      • Hours of Precip: 1
      • Rain: 0.04 in
      More
    • Sun

      Oct 2

      78° /59°
      A couple of afternoon showers
      • Very Good
      • for driving
      • Precip: 63%
      • Hours of Precip: 2
      • Rain: 0.16 in
      More
    • Mon

      Oct 3

      75° /57°
      Sun and some clouds
      • Excellent
      • for driving
      • Precip: 25%
      • Hours of Precip: 0
      • Rain: 0 in
      More
    Thursday
    12pm
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    7pm
    Forecast Rain Rain Cloudy T-storms T-storms Cloudy Cloudy T-storms
    Temp (°F) 68° 69° 69° 68° 68° 67° 66° 65°
    RealFeel® 63° 63° 67° 64° 63° 65° 63° 57°
    Wind (mph) 17 E 21 E 23 E 20 E 17 E 16 E 17 ENE 17 ENE
    precip
    12pm
    1pm
    2pm
    3pm
    4pm
    5pm
    6pm
    7pm
    Rain
    75%
    75%
    49%
    58%
    58%
    49%
    47%
    51%
    Snow
    0%
    0%
    0%
    0%
    0%
    0%
    0%
    0%
    Ice
    0%
    0%
    0%
    0%
    0%
    0%
    0%
    0%
    SKY
    12pm
    1pm
    2pm
    3pm
    4pm
    5pm
    6pm
    7pm
    UV Index 1 1 1 1 1 0 0 0
    Cloud Cover 94% 94% 94% 94% 94% 94% 94% 94%
    Humidity 98% 97% 97% 99% 100% 100% 100% 100%
    Dew Point 68° 68° 68° 68° 68° 67° 66° 65°
    Temp °F
    12pm
    1pm
    2pm
    3pm
    4pm
    5pm
    6pm
    7pm
    70° 65°

    Temperature History

    more Historical Weather Data >
      Today Normal Record 9/29/2015
    High 69° 70° N/A 79°
    Low 62° 54° N/A 68°

    Sunrise/Sunset

    • Sunrise: 7:03 AM
    • Sunset: 6:53 PM
    • Duration: 11:50 hr

    Moonrise/Moonset

    • Moonrise: 5:38 AM
    • Moonset: 6:25 PM
    • Duration: 12:47 hr
    Astronomy

    Rockville Weather Report

    Persistent rain to raise flood risk in part of northeastern US late this week

    September 29, 2016; 4:55 AM ET

    Rain will spread over much of the northeastern U.S. into the weekend, but persistent downpours will raise the flood risk in part of the mid-Atlantic. More >

    Thu. Travel Weather

    48 Hour Precipitation Forecast

    Thu. Driving Weather