, °F

Personalized Forecasts

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    My Recent Locations

    • Today

      May 25

      73° /56°F
      A heavy thunderstorm
      • Poor
      • for stargazing
      • Cloud Cover: 67%
      • Precip: 55%
      • Hours of Precip: 2.5
    • Fri

      May 26

      76° /57°
      A passing morning shower
      • Good
      • for stargazing
      • Cloud Cover: 45%
      • Precip: 9%
      • Hours of Precip: 0.5
      More
    • Sat

      May 27

      78° /61°
      A couple of afternoon showers
      • Poor
      • for stargazing
      • Cloud Cover: 87%
      • Precip: 25%
      • Hours of Precip: 2
      More
    • Sun

      May 28

      77° /62°
      Thundershower
      • Poor
      • for stargazing
      • Cloud Cover: 75%
      • Precip: 63%
      • Hours of Precip: 3.5
      More
    • Mon

      May 29

      81° /59°
      A t-storm in the afternoon
      • Excellent
      • for stargazing
      • Cloud Cover: 55%
      • Precip: 16%
      • Hours of Precip: 0.5
      More

    Day

    73°Hi RealFeel® 78° Precipitation 55%
    Rather cloudy with a heavy thunderstorm; thunderstorms may bring hail and damaging winds
    • SSW 6 mph
    • Gusts: 12 mph
    • Max UV Index: 4 (Moderate)
    • Thunderstorms: 60%
    • Precipitation: 0.2 in
    • Rain: 0.2 in
    • Snow: 0 in
    • Ice: 0 in
    • Hours of Precipitation: 1.5 hrs
    • Hours of Rain: 1.5 hrs

    Night

    56°Lo RealFeel® 53° Precipitation 55%
    Partly cloudy with a shower or thunderstorm around
    • W 6 mph
    • Gusts: 9 mph
    • Max UV Index: N/A
    • Thunderstorms: 48%
    • Precipitation: 0.1 in
    • Rain: 0.1 in
    • Snow: 0 in
    • Ice: 0 in
    • Hours of Precipitation: 1 hrs
    • Hours of Rain: 1 hrs

    Temperature History

    more Historical Weather Data >
      Today Normal Record 5/25/2016
    High 73° 77° 92° (1991) 86°
    Low 56° 54° 36° (1967) 52°

    Sunrise/Sunset

    • Sunrise: 5:49 AM
    • Sunset: 8:24 PM
    • Duration: 14:35 hr

    Moonrise/Moonset

    • Moonrise: 5:57 AM
    • Moonset: 8:17 PM
    • Duration: 14:20 hr
    Astronomy

    Solunar Information for Herndon, VA

    Thu, May 25
    New
    Thu, Jun 1
    First
    Fri, Jun 9
    Full
    Sat, Jun 17
    Last

    Thu. Stargazing