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      Elev 387 ft, 38.972 °N 77.390 °W

      Herndon, VA

      Summary

      Temperature (°F) Actual Historic Avg. Record
      High Temp765878
      Low Temp563716
      Day Average Temp63.44--
      Precipitation (in) Actual Historic Avg. Record
      Precipitation0.014.8-
      Dew Point (°F) Actual Historic Avg. Record
      Dew Point50.07--
      High57--
      Low39--
      Average50.07--
      Wind (mph) Actual Historic Avg. Record
      Max Wind Speed15--
      Visibility10--
      Sea Level Pressure (in) Actual Historic Avg. Record
      Sea Level Pressure29.49--
      Astronomy Day Length Rise Set
      Actual Time10h 9m6:48 AM4:58 PM
      Civil Twilight6:20 AM5:26 PM
      Nautical Twilight5:48 AM5:58 PM
      Astronomical Twilight5:16 AM6:30 PM
      Moon: Waxing gibbous2:34 PM1:31 AM

      Daily Observations

      TimeTemperatureDew PointHumidityWindWind SpeedWind GustPressurePrecip.Condition
      12:08 AM 56 °F 53 °F 90 % SSW 13 mph 22 mph 29.58 in 0 in Cloudy
      12:52 AM 57 °F 54 °F 89 % SW 5 mph - 29.58 in 0 in Cloudy
      1:52 AM 57 °F 54 °F 89 % SSW 9 mph - 29.55 in 0 in Cloudy
      1:59 AM 57 °F 54 °F 89 % SSW 10 mph - 29.54 in 0 in Light Rain
      2:52 AM 58 °F 55 °F 90 % SSW 12 mph 21 mph 29.54 in 0 in Light Rain
      3:52 AM 58 °F 55 °F 90 % SSW 14 mph - 29.52 in 0 in Cloudy
      4:52 AM 58 °F 55 °F 90 % SW 12 mph - 29.53 in 0 in Cloudy
      5:17 AM 58 °F 55 °F 90 % SW 5 mph - 29.54 in 0 in Light Drizzle
      5:52 AM 58 °F 55 °F 90 % SSW 10 mph - 29.53 in 0 in Cloudy
      6:52 AM 57 °F 55 °F 93 % S 9 mph - 29.52 in 0.01 in Mostly Cloudy
      7:52 AM 58 °F 55 °F 90 % SW 3 mph - 29.52 in 0 in Partly Cloudy
      8:52 AM 61 °F 56 °F 83 % SW 8 mph - 29.52 in 0 in Partly Cloudy
      9:52 AM 64 °F 57 °F 78 % SSW 7 mph - 29.51 in 0 in Partly Cloudy
      10:52 AM 69 °F 57 °F 65 % SSW 9 mph - 29.49 in 0 in Fair
      11:52 AM 72 °F 54 °F 53 % WNW 12 mph - 29.46 in 0 in Mostly Cloudy
      12:52 PM 73 °F 52 °F 48 % W 12 mph 22 mph 29.43 in 0 in Partly Cloudy
      1:52 PM 74 °F 51 °F 45 % WNW 14 mph - 29.4 in 0 in Partly Cloudy
      2:52 PM 76 °F 50 °F 40 % WNW 13 mph - 29.39 in 0 in Partly Cloudy
      3:52 PM 75 °F 45 °F 34 % W 6 mph - 29.38 in 0 in Fair
      4:52 PM 71 °F 43 °F 36 % W 6 mph - 29.39 in 0 in Fair
      5:52 PM 66 °F 43 °F 43 % WNW 7 mph - 29.41 in 0 in Fair
      6:52 PM 65 °F 41 °F 42 % NW 9 mph - 29.43 in 0 in Fair
      7:52 PM 64 °F 39 °F 40 % NNW 10 mph - 29.44 in 0 in Fair
      8:52 PM 61 °F 41 °F 48 % NW 8 mph - 29.46 in 0 in Fair
      9:52 PM 63 °F 41 °F 45 % NW 15 mph 26 mph 29.5 in 0 in Fair
      10:52 PM 64 °F 41 °F 43 % WNW 10 mph 21 mph 29.51 in 0 in Cloudy
      11:52 PM 63 °F 41 °F 45 % NW 14 mph 26 mph 29.52 in 0 in Cloudy
      Level Access
      Glossary