• Today

    Aug 2

    88°Lo 65°

    Sunny to partly cloudy

    Excellent for an outdoor bbq
    • Precip
      4%
    • Hi
      RealFeel
      94°
    • Wind
      Speed
      5 mph
    more
  • Mon

    Aug 3

    91°Lo 68°

    Partly sunny and hot

    Excellent for an outdoor bbq
    • Precip
      6%
    • Hi
      RealFeel
      93°
    • Wind
      Speed
      9 mph
    more
  • Tue

    Aug 4

    88°Lo 62°

    A thunderstorm in the area

    Very Good for an outdoor bbq
    • Precip
      40%
    • Hi
      RealFeel
      91°
    • Wind
      Speed
      8 mph
  • Wed

    Aug 5

    88°Lo 66°

    An afternoon thunderstorm

    Very Good for an outdoor bbq
    • Precip
      51%
    • Hi
      RealFeel
      90°
    • Wind
      Speed
      7 mph
    more
  • Thu

    Aug 6

    82°Lo 67°

    Thunderstorms possible

    Good for an outdoor bbq
    • Precip
      35%
    • Hi
      RealFeel
      86°
    • Wind
      Speed
      7 mph
    more
Next Previous
Hi 88° RealFeel® 91° Precipitation 40%

Day

N

E

S

W

  • W 8 mph
  • Gusts: 13 mph

Times of clouds and sun with a shower or thunderstorm around

  • Max UV Index: 6 (High)
  • Thunderstorms: 60%
  • Precipitation: 0.08 in
  • Rain: 0.08 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 1 hrs
  • Hours of Rain: 1 hrs
Lo 62° RealFeel® 61° Precipitation 65%

Night

N

E

S

W

  • WNW 5 mph
  • Gusts: 10 mph

Increasing clouds with a couple of soaking showers

  • Max UV Index: N/A
  • Thunderstorms: 20%
  • Precipitation: 0.32 in
  • Rain: 0.32 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 4 hrs
  • Hours of Rain: 4 hrs

Temperature History - Aug 4

more Historical Weather Data >
  Today Normal Record 8/4/2014
High 88° 88° 99° (2002) 85°
Low 62° 65° 51° (1976) 62°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:13 AM with 14:05 of sunlight, then sets at 8:18 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 11:03 PM with 13:09 of moolight, then sets at 12:12 PM

Herndon Weather Report

DC, Baltimore: Hot, Dry Weather to Last Through Weekend

August 2, 2015; 4:05 AM ET

Humidity will ease across the region, but there is not much relief in sight for the hot weather. more >

Is Your Outdoor Gear Waterproof?

Dec 5, 2012; 5:00 AM ET Now that it's cold enough to hit the slopes, you may want to look more closely at what materials your winter sports gear is made of. As it turns out, not all waterproofing is created equal.

Tue. Outdoor Entertaining

Tue. Wind Maps

Tue. UV Index