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      Elev 387 ft, 38.972 °N 77.390 °W

      Herndon, VA

      Herndon Heights Station
      Updated: 3:14 AM EDT on August 24, 2026 (GMT -4)
      2 minutes ago
      81°
      59°
      62
      Feels Like 62
      Clear
      N
      3
      Lower temperature is expected today
      50
      50
      575
      90
      50
      7
      0 mph
      50
      50
      50
      50
      50
      50
      Radar · Now
      Today
      Mon 08/24
      High 81°f
      6% Precip. / 0 in
      Mostly sunny. High 81F. Winds WNW at 5 to 10 mph.
      Tonight
      Mon 08/24
      Low 58°f
      5% Precip. / 0 in
      A clear sky. Low 58F. Winds NW at 5 to 10 mph.
      Tomorrow
      Tue 08/25
      High 83°f62°f
      5% Precip. / 0 in
      Sunny along with a few clouds. High 83F. Winds WNW at 5 to 10 mph.
      Hourly Forecast
      Now
      62°
      4AM
      61°
      5AM
      61°
      6AM
      60°
      6:31AM
      Sunrise
      7AM
      61°
      8AM
      65°
      9AM
      69°
      10AM
      72°
      11AM
      75°
      12PM
      77°
      1PM
      78°
      2PM
      79°
      3PM
      80°
      4PM
      80°
      5PM
      80°
      6PM
      79°
      7PM
      76°
      7:51PM
      Sunset
      8PM
      73°
      9PM
      70°
      10PM
      67°
      11PM
      66°
      12AM
      64°
      1AM
      63°
      2AM
      62°
      3AM
      61°
      Precipitation
      7%
      Pollen
      Grass Pollen
      Low
      Air Quality
      41
      Good
      UV Index
      0
      Low
      Additional Conditions
      1. Pressure 29.93 in
      2. Visibility 10 miles
      3. Clouds Clear
      4. Dew Point56°F
      5. Humidity 80%
      6. Rainfall 0 in
      7. Snow Depth 0 in
       KIAD Station History
      Almanac for August 24, 2026
      1. Forecast Average Record
      2. Temperature
      3. High 81°F 86°F 97°F 1998
      4. Low 59°F 64°F 46°F 1987
      5. Rain/Snow Depth
      6. Precipitation 0 in 3.9 in -
      7. Snow 0 in 0 in -
      Almanac for August 25, 2026
      1. Forecast Average Record
      2. Temperature
      3. High 83°F 85°F 97°F
      4. Low 59°F 64°F 47°F
      Astronomy
      1. Sun Rise Set
      2. Actual Time 6:31 AM 7:51 PM
      3. Civil Twilight 6:03 AM 8:19 PM
      4. Nautical Twilight 5:30 AM 8:52PM
      5. Astronomical Twilight 4:55 AM 9:27 PM
      1. Length of Visible Light 14h 16m
      2. Length of Day 13h 20m
      3. Tomorrow will be 2 minutes 21 seconds shorter
      1. Moon 6:10 PM 2:40 AM
      2. Waxing Gibbous89% of the Moon is Illuminated
      Aug 28
      Full Moon
      Sep 4
      Waning Half Last Qtr
      Sep 10
      New Moon
      Sep 18
      Waxing Half First Qtr
      Precipitation
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