• Today

    Jul 28

    91°Lo 73°

    A heavy afternoon t-storm

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

    Jul 29

    83°Lo 67°

    Not as hot with thunderstorms

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

    Jul 30

    85°Lo 70°

    Thundershower

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

    Jul 31

    83°Lo 69°

    Mostly cloudy with a t-storm

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

    Aug 1

    83°Lo 68°

    Mostly cloudy with a t-storm

    Low ragweed pollen levels
    • Grass
      Pollen
      1 - Low
    • Ragweed
      Pollen
      1 - Low
    • Tree
      Pollen
      1 - Low
    more
Next Previous
Hi 85° RealFeel® 98° Precipitation 55%

Day

N

E

S

W

  • ESE 5 mph
  • Gusts: 8 mph

Mostly cloudy and humid with a shower or thunderstorm around, mainly later

  • Max UV Index: 6 (High)
  • Thunderstorms: 60%
  • Precipitation: 0.05 in
  • Rain: 0.05 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0.5 hrs
  • Hours of Rain: 0.5 hrs
Lo 70° RealFeel® 70° Precipitation 69%

Night

N

E

S

W

  • SE 5 mph
  • Gusts: 8 mph

An evening thunderstorm or two; otherwise, mostly cloudy

  • Max UV Index: N/A
  • Thunderstorms: 60%
  • Precipitation: 0.51 in
  • Rain: 0.51 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 2 hrs
  • Hours of Rain: 2 hrs

Temperature History - Jul 30

more Historical Weather Data >
  Today Normal Record 7/30/2015
High 85° 84° N/A 90°
Low 70° 69° N/A 73°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:08 AM with 14:13 of sunlight, then sets at 8:21 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 3:00 AM with 14:36 of moolight, then sets at 5:36 PM

Rockville Weather Report

Heat wave to deteriorate across northeastern US as downpours unleash up to 2 inches of rain

July 28, 2016; 5:11 AM ET

As July draws to a close, a storm system swinging up from the Deep South will bring downpours to the northeastern U.S. and break the back of an extended heat wave. more >

Sat. Dust & Dander

Sat. Wind Maps