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      Elev 387 ft, 38.976 °N 77.382 °W

      Herndon, VA

      Summary

      Temperature (°F) Actual Historic Avg. Record
      High Temp697192
      Low Temp494830
      Day Average Temp57.25--
      Precipitation (in) Actual Historic Avg. Record
      Precipitation03.2-
      Dew Point (°F) Actual Historic Avg. Record
      Dew Point43.58--
      High46--
      Low38--
      Average43.58--
      Wind (mph) Actual Historic Avg. Record
      Max Wind Speed10--
      Visibility10--
      Sea Level Pressure (in) Actual Historic Avg. Record
      Sea Level Pressure29.64--
      Astronomy Day Length Rise Set
      Actual Time11h 27m7:12 AM6:40 PM
      Civil Twilight6:45 AM7:07 PM
      Nautical Twilight6:15 AM7:38 PM
      Astronomical Twilight5:44 AM8:08 PM
      Moon: Waxing crescent1:02 PM9:53 PM

      Daily Observations

      TimeTemperatureDew PointHumidityWindWind SpeedWind GustPressurePrecip.Condition
      12:52 AM 57 °F 45 °F 64 % NW 7 mph - 29.64 in 0 in Fair
      1:52 AM 54 °F 44 °F 69 % NW 5 mph - 29.65 in 0 in Fair
      2:52 AM 53 °F 44 °F 71 % NW 5 mph - 29.64 in 0 in Fair
      3:52 AM 52 °F 44 °F 74 % NW 6 mph - 29.64 in 0 in Fair
      4:52 AM 52 °F 45 °F 77 % NW 6 mph - 29.64 in 0 in Fair
      5:52 AM 51 °F 44 °F 77 % NNW 5 mph - 29.65 in 0 in Fair
      6:52 AM 50 °F 44 °F 80 % NNW 5 mph - 29.66 in 0 in Fair
      7:52 AM 51 °F 44 °F 77 % NW 5 mph - 29.67 in 0 in Fair
      8:52 AM 55 °F 46 °F 72 % NW 8 mph - 29.69 in 0 in Fair
      9:52 AM 55 °F 46 °F 72 % WNW 10 mph - 29.69 in 0 in Fair
      10:52 AM 60 °F 46 °F 60 % VAR 3 mph - 29.68 in 0 in Fair
      11:52 AM 65 °F 45 °F 48 % VAR 5 mph - 29.67 in 0 in Fair
      12:52 PM 66 °F 40 °F 38 % VAR 6 mph - 29.65 in 0 in Fair
      1:52 PM 68 °F 38 °F 33 % VAR 3 mph - 29.63 in 0 in Fair
      2:52 PM 69 °F 42 °F 38 % WNW 8 mph - 29.61 in 0 in Partly Cloudy
      3:52 PM 68 °F 42 °F 39 % WNW 8 mph - 29.6 in 0 in Partly Cloudy
      4:52 PM 66 °F 41 °F 40 % W 6 mph - 29.6 in 0 in Mostly Cloudy
      5:52 PM 67 °F 41 °F 39 % NW 8 mph - 29.6 in 0 in Partly Cloudy
      6:52 PM 61 °F 41 °F 48 % CALM 0 mph - 29.61 in 0 in Fair
      7:52 PM 52 °F 45 °F 77 % CALM 0 mph - 29.62 in 0 in Fair
      8:52 PM 52 °F 45 °F 77 % SW 3 mph - 29.64 in 0 in Fair
      9:52 PM 50 °F 44 °F 80 % SSE 3 mph - 29.65 in 0 in Fair
      10:52 PM 51 °F 45 °F 80 % CALM 0 mph - 29.65 in 0 in Fair
      11:52 PM 49 °F 45 °F 86 % CALM 0 mph - 29.65 in 0 in Fair
      Level Access
      Glossary