• Tonight

    Jul 29

    Lo 72°

    Partly cloudy and humid

    Migraine Headache Weather
    • Hi
      RealFeel
      96°
    • UV
      5 - High
    • Cloud
      Cover
      70%
    more
  • Sat

    Jul 30

    85°Lo 69°

    Heavy afternoon thunderstorms

    Beneficial weather for migraines
    • Hi
      RealFeel
      96°
    • UV
      4 - Moderate
    • Cloud
      Cover
      89%
    more
  • Sun

    Jul 31

    89°Lo 70°

    A couple of thunderstorms

    Beneficial weather for migraines
    • Hi
      RealFeel
      104°
    • UV
      4 - Moderate
    • Cloud
      Cover
      77%
    more
  • Mon

    Aug 1

    88°Lo 67°

    Periods of sun

    Beneficial weather for migraines
    • Hi
      RealFeel
      94°
    • UV
      5 - High
    • Cloud
      Cover
      46%
    more
  • Tue

    Aug 2

    84°Lo 65°

    Periods of clouds and sun

    Beneficial weather for migraines
    • Hi
      RealFeel
      87°
    • UV
      5 - High
    • Cloud
      Cover
      47%
Next Previous
Hi 84° RealFeel® 87° Precipitation 6%

Day

N

E

S

W

  • NW 7 mph
  • Gusts: 10 mph

Periods of clouds and sun

  • Max UV Index: 7 (High)
  • Thunderstorms: 11%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs
Lo 65° RealFeel® 64° Precipitation 10%

Night

N

E

S

W

  • NW 4 mph
  • Gusts: 7 mph

Partly cloudy

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

Temperature History - Aug 2

more Historical Weather Data >
  Today Normal Record 8/2/2015
High 84° 88° 99° (2002) 87°
Low 65° 65° 52° (1998) 61°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:12 AM with 14:07 of sunlight, then sets at 8:19 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 5:57 AM with 14:10 of moolight, then sets at 8:07 PM

Herndon Weather Report

Soaking storms to elevate flash flood threat in northeastern US this weekend

July 29, 2016; 5:10 PM ET

Rounds of drenching showers and heavy thunderstorms will heighten the risk of flash flooding across the northeastern United States through the final weekend of July. more >

Tue. Migraine Headache

Tue. UV Index