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      Elev 425 ft, 38.843 °N 77.306 °W

      Fairfax, VA

      Updated: 8:53 PM EDT on August 18, 2026 (GMT -4)
      34 seconds ago
      87°
      70°
      77
      Feels Like 78
      Clear
      N
      4
      Similar temperature is expected tomorrow
      50
      50
      575
      90
      50
      7
      0 mph
      50
      50
      50
      50
      50
      50
      Radar · Now
      Tonight
      Tue 08/18
      Low 67°f
      5% Precip. / 0 in
      A clear sky. Low 67F. Winds light and variable.
      Tomorrow
      Wed 08/19
      High 89°f
      5% Precip. / 0 in
      Mainly sunny. High 89F. Winds WNW at 5 to 10 mph.
      Tomorrow night
      Wed 08/19
      Low 71°f
      14% Precip. / 0 in
      A few clouds from time to time. Low 71F. Winds light and variable.
      Hourly Forecast
      Now
      77°
      9PM
      77°
      10PM
      75°
      11PM
      73°
      12AM
      72°
      1AM
      71°
      2AM
      70°
      3AM
      70°
      4AM
      69°
      5AM
      68°
      6AM
      68°
      6:26AM
      Sunrise
      7AM
      68°
      8AM
      71°
      9AM
      75°
      10AM
      78°
      11AM
      81°
      12PM
      83°
      1PM
      85°
      2PM
      86°
      3PM
      87°
      4PM
      87°
      5PM
      87°
      6PM
      86°
      7PM
      83°
      7:58PM
      Sunset
      8PM
      80°
      Additional Conditions
      1. Pressure 29.91 in
      2. Visibility 10 miles
      3. Clouds Partly Cloudy
      4. Dew Point66°F
      5. Humidity 67%
      6. Rainfall 0 in
      7. Snow Depth 0 in
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      Astronomy
      1. Sun Rise Set
      2. Actual Time 6:26 AM 7:58 PM
      3. Civil Twilight 5:58 AM 8:26 PM
      4. Nautical Twilight 5:24 AM 9:00PM
      5. Astronomical Twilight 4:48 AM 9:35 PM
      1. Length of Visible Light 14h 27m
      2. Length of Day 13h 31m
      3. Tomorrow will be 2 minutes 17 seconds shorter
      1. Moon 1:54 PM 11:23 PM
      2. First quarter46% of the Moon is Illuminated
      Aug 26
      Full Moon
      Sep 3
      Waning Half Last Qtr
      Sep 16
      Waxing Half First Qtr
      -
      -
      KIAD Station History
      Almanac for August 19, 2026
      1. Forecast Average Record
      2. Temperature
      3. High 87°F 86°F 95°F 2019
      4. Low 70°F 65°F 51°F 1998
      5. Rain/Snow Depth
      6. Precipitation 0 in 4.1 in -
      7. Snow 0 in 0 in -
      Almanac for August 20, 2026
      1. Forecast Average Record
      2. Temperature
      3. High 89°F 86°F 104°F
      4. Low 70°F 65°F 47°F
      Precipitation
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      Weather Alerts
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