• Today

    Aug 31

    88°Lo 70°

    Warmer; a heavy p.m. t-storm

    Very Good for travel
    • Rain
      0.47 in
    • Wind
      Speed
      7 mph
    • T-storms
      60%
  • Mon

    Sep 1

    89°Lo 68°

    Thundershower

    Very Good for travel
    • Rain
      0.09 in
    • Wind
      Speed
      6 mph
    • T-storms
      60%
    more
  • Tue

    Sep 2

    93°Lo 70°

    A thunderstorm in spots

    Very Good for travel
    • Rain
      0.09 in
    • Wind
      Speed
      6 mph
    • T-storms
      40%
    more
  • Wed

    Sep 3

    88°Lo 65°

    Partly sunny

    Excellent for travel
    • Rain
      0 in
    • Wind
      Speed
      5 mph
    • T-storms
      10%
    more
  • Thu

    Sep 4

    88°Lo 66°

    Sunny to partly cloudy

    Excellent for travel
    • Rain
      0 in
    • Wind
      Speed
      4 mph
    • T-storms
      11%
    more
Next Previous
Hi 88° RealFeel® 94° Precipitation 57%

Day

N

E

S

W

  • SSW 7 mph
  • Gusts: 14 mph

Variably cloudy and warmer; a heavy p.m. t-storm; storms can bring downpours and damaging winds

  • Max UV Index: 5 (Moderate)
  • Thunderstorms: 60%
  • Precipitation: 0.22 in
  • Rain: 0.22 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 1 hrs
  • Hours of Rain: 1 hrs
Lo 70° RealFeel® 71° Precipitation 61%

Night

N

E

S

W

  • S 3 mph
  • Gusts: 5 mph

Rather cloudy and humid with a couple of showers and a thunderstorm

  • Max UV Index: N/A
  • Thunderstorms: 60%
  • Precipitation: 0.25 in
  • Rain: 0.25 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 3 hrs
  • Hours of Rain: 3 hrs

Temperature History - Aug 31

more Historical Weather Data >
  Today Normal Record 8/31/2013
High 88° 85° 98° (1991) 90°
Low 70° 62° 43° (1976) 70°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:37 AM with 13:05 of sunlight, then sets at 7:42 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 12:18 PM with 10:40 of moolight, then sets at 10:58 PM

Top Story

Herndon Weather Report

DC: Summer Heat to Hold Beyond Labor Day

August 31, 2014; 4:04 AM ET

Labor Day weekend traditionally marks the unofficial end to summer, but the weather has another idea in mind around Washington, D.C., with a prolonged stretch of summer heat underway. more >

Labor Day Outlook

Aug 31, 2014; 2:00 AM ET It will feel like summer across the South on Labor Day while the surge of cool air floods across the northern Plains.

Weather Related Flight Delays

Sun. Travel Weather

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