• Today

    Jul 13

    90°Lo 71°

    A t-storm late this afternoon

    Very Good for an outdoor bbq
    • Precip
      40%
    • Hi
      RealFeel
      93°
    • Wind
      Gust
      15 mph
  • Mon

    Jul 14

    90°Lo 70°

    Strong t-storms, mainly later

    Good for an outdoor bbq
    • Precip
      66%
    • Hi
      RealFeel
      101°
    • Wind
      Gust
      11 mph
    more
  • Tue

    Jul 15

    84°Lo 61°

    Heavy t-storms; mostly cloudy

    Poor for an outdoor bbq
    • Precip
      70%
    • Hi
      RealFeel
      94°
    • Wind
      Gust
      9 mph
    more
  • Wed

    Jul 16

    79°Lo 59°

    Partly sunny and pleasant

    Excellent for an outdoor bbq
    • Precip
      24%
    • Hi
      RealFeel
      83°
    • Wind
      Gust
      10 mph
    more
  • Thu

    Jul 17

    79°Lo 60°

    Partly sunny and nice

    Excellent for an outdoor bbq
    • Precip
      25%
    • Hi
      RealFeel
      84°
    • Wind
      Gust
      8 mph
    more
Next Previous
Hi 90° RealFeel® 93° Precipitation 40%

Day

N

E

S

W

  • SSW 8 mph
  • Gusts: 15 mph

Humid with times of clouds and sun; a thunderstorm in spots late this afternoon

  • Max UV Index: 7 (High)
  • Thunderstorms: 60%
  • Precipitation: 0.04 in
  • Rain: 0.04 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0.5 hrs
  • Hours of Rain: 0.5 hrs
Lo 71° RealFeel® 72° Precipitation 61%

Night

N

E

S

W

  • SSW 5 mph
  • Gusts: 11 mph

Mostly cloudy with a couple of showers and a thunderstorm

  • Max UV Index: N/A
  • Thunderstorms: 60%
  • Precipitation: 0.22 in
  • Rain: 0.22 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 4 hrs
  • Hours of Rain: 4 hrs

Temperature History - Jul 13

more Historical Weather Data >
  Today Normal Record 7/13/2013
High 90° 88° 97° (1966) 84°
Low 71° 66° 52° (1978) 69°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 5:55 AM with 14:41 of sunlight, then sets at 8:36 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 9:24 PM with 11:10 of moolight, then sets at 8:34 AM

Top Story

Herndon Weather Report

DC: Severe Storm, Flooding Threat to Start the New Week

July 13, 2014; 3:34 AM ET

The risk of severe thunderstorms and flash flooding will ramp up quickly for the start of the new week. more >

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Sun. Outdoor Entertaining

Sun. Wind Maps

Sun. UV Index