• 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
  • 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
    more
Next Previous
Hi 82° RealFeel® 89° Precipitation 59%

Day

N

E

S

W

  • N 5 mph
  • Gusts: 8 mph

Some sun returning; not as warm with a shower or thunderstorm around into the early afternoon

  • Max UV Index: 5 (Moderate)
  • Thunderstorms: 40%
  • Precipitation: 0.27 in
  • Rain: 0.27 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 2 hrs
  • Hours of Rain: 2 hrs
Lo 61° RealFeel® 60° Precipitation 14%

Night

N

E

S

W

  • N 6 mph
  • Gusts: 8 mph

Clear

  • 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 1

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

    Low

  • Ragweed Pollen

    Moderate

  • Mold

    High

  • Grass Pollen

    Moderate

Temperature History - Sep 1

more Historical Weather Data >
  Today Normal Record 9/1/2015
High 82° 81° N/A 91°
Low 61° 65° N/A 66°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:38 AM with 13:00 of sunlight, then sets at 7:38 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 6:47 AM with 13:06 of moolight, then sets at 7:53 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 >

Thu. Pollen

Thu. Dust & Dander

Thu. Wind Maps