• Today

    Sep 18

    74°Lo 53°

    Clouds giving way to some sun

    Moderate ragweed pollen levels
    • Grass
      Pollen
      2 - Low
    • Ragweed
      Pollen
      30 - Moderate
    • Tree
      Pollen
      0 - Low
  • Fri

    Sep 19

    72°Lo 57°

    Fog in the a.m.; partly sunny

    Moderate ragweed pollen levels
    • Grass
      Pollen
      2 - Low
    • Ragweed
      Pollen
      30 - Moderate
    • Tree
      Pollen
      0 - Low
    more
  • Sat

    Sep 20

    78°Lo 59°

    Intervals of clouds and sun

    Moderate ragweed pollen levels
    • Grass
      Pollen
      2 - Low
    • Ragweed
      Pollen
      30 - Moderate
    • Tree
      Pollen
      0 - Low
    more
  • Sun

    Sep 21

    82°Lo 60°

    An afternoon thunderstorm

    Moderate ragweed pollen levels
    • Precip
      55%
    • Wind
      Speed
      5 mph
    • Cloud
      Cover
      42%
    more
  • Mon

    Sep 22

    74°Lo 50°

    Chance of a shower

    Ragweed Pollen Weather
    • Precip
      30%
    • Wind
      Speed
      6 mph
    • Cloud
      Cover
      51%
    more
Next Previous
Hi 74° RealFeel® 78° Precipitation 25%

Day

N

E

S

W

  • N 2 mph
  • Gusts: 9 mph

Comfortable; cloudy this morning, then intervals of clouds and sunshine this afternoon

  • Max UV Index: 5 (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
Lo 53° RealFeel® 51° Precipitation 11%

Night

N

E

S

W

  • N 3 mph
  • Gusts: 5 mph

Partly cloudy

  • Max UV Index: N/A
  • Thunderstorms: 0%
  • 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 - September 18

  • Extreme
  • Very High
  • High
  • Moderate
  • Low
  • Grass

    Pollen

    Low

  • Weed

    Pollen

    Moderate

  • Tree

    Pollen

    Low

  • Mold

    Pollen

    Low

Temperature History - Sep 18

more Historical Weather Data >
  Today Normal Record 9/18/2013
High 74° 79° 91° (1927) 74°
Low 53° 62° 45° (1937) 52°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:52 AM with 12:21 of sunlight, then sets at 7:13 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 1:45 AM with 14:15 of moolight, then sets at 4:00 PM

Top Story

Rockville Weather Report

DC: Remainder of Week to Be Dry, Cool

September 18, 2014; 7:11 AM ET

Rainfall will be scarce around Washington, D.C., this week, but cool air will be plentiful. more >

Thu. Pollen

Thu. Dust & Dander

Thu. Wind Maps