• Today

    Aug 31

    88°Lo 69°

    Very warm with sun and clouds

    Moderate ragweed pollen levels
    • Grass
      Pollen
      3 - Moderate
    • Ragweed
      Pollen
      3 - Moderate
    • Tree
      Pollen
      1 - Low
    more
  • Thu

    Sep 1

    82°Lo 61°

    Not as warm with a t-storm

    Moderate ragweed pollen levels
    • Grass
      Pollen
      3 - Moderate
    • Ragweed
      Pollen
      3 - Moderate
    • Tree
      Pollen
      1 - Low
    more
  • Fri

    Sep 2

    78°Lo 62°

    Sun and some clouds

    Moderate ragweed pollen levels
    • Grass
      Pollen
      3 - Moderate
    • Ragweed
      Pollen
      3 - Moderate
    • Tree
      Pollen
      1 - Low
    more
  • Sat

    Sep 3

    77°Lo 58°

    Pleasant with plenty of sun

    Moderate ragweed pollen levels
    • Grass
      Pollen
      3 - Moderate
    • Ragweed
      Pollen
      3 - Moderate
    • Tree
      Pollen
      1 - Low
    more
  • Sun

    Sep 4

    79°Lo 56°

    Pleasant with plenty of sun

    Low ragweed pollen levels
    • Grass
      Pollen
      1 - Low
    • Ragweed
      Pollen
      1 - Low
    • Tree
      Pollen
      1 - Low
Next Previous
Hi 79° RealFeel® 84° Precipitation 6%

Day

N

E

S

W

  • ENE 5 mph
  • Gusts: 8 mph

Pleasant with plenty of sun

  • Max UV Index: 6 (High)
  • 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 56° RealFeel® 57° Precipitation 6%

Night

N

E

S

W

  • WSW 2 mph
  • Gusts: 7 mph

Clear

  • Max UV Index: N/A
  • Thunderstorms: 2%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs

Temperature History - Sep 4

more Historical Weather Data >
  Today Normal Record 9/4/2015
High 79° 80° N/A 90°
Low 56° 64° N/A 70°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:41 AM with 12:52 of sunlight, then sets at 7:33 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 9:41 AM with 11:44 of moolight, then sets at 9:25 PM

Rockville Weather Report

September to start on cooler, less humid note in northeastern US

August 31, 2016; 1:24 AM ET

Brief relief from heat and humidity will arrive in the northeastern United States during the first days of September. more >

Sun. Dust & Dander

Sun. Wind Maps