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      Elev 367 ft, 38.940 °N 77.399 °W

      Herndon, VA

      Summary

      Temperature (°F) Actual Historic Avg. Record
      High Temp647289
      Low Temp474928
      Day Average Temp55.31--
      Precipitation (in) Actual Historic Avg. Record
      Precipitation03.1-
      Dew Point (°F) Actual Historic Avg. Record
      Dew Point37.63--
      High39--
      Low34--
      Average37.63--
      Wind (mph) Actual Historic Avg. Record
      Max Wind Speed8--
      Visibility10--
      Sea Level Pressure (in) Actual Historic Avg. Record
      Sea Level Pressure29.86--
      Astronomy Day Length Rise Set
      Actual Time11h 34m7:10 AM6:44 PM
      Civil Twilight6:43 AM7:10 PM
      Nautical Twilight6:12 AM7:41 PM
      Astronomical Twilight5:41 AM8:12 PM
      Moon: Waning crescent2:40 AM4:44 PM

      Daily Observations

      TimeTemperatureDew PointHumidityWindWind SpeedWind GustPressurePrecip.Condition
      12:52 AM 57 °F 38 °F 49 % NNW 7 mph - 29.83 in 0 in Fair
      1:52 AM 55 °F 38 °F 53 % NNW 7 mph - 29.84 in 0 in Fair
      2:52 AM 53 °F 39 °F 59 % NW 8 mph - 29.84 in 0 in Fair
      3:52 AM 51 °F 39 °F 63 % NNW 6 mph - 29.84 in 0 in Fair
      4:52 AM 48 °F 39 °F 71 % CALM 0 mph - 29.85 in 0 in Fair
      5:52 AM 48 °F 39 °F 71 % NW 5 mph - 29.86 in 0 in Fair
      6:52 AM 48 °F 39 °F 71 % WNW 5 mph - 29.88 in 0 in Fair
      7:52 AM 47 °F 39 °F 74 % CALM 0 mph - 29.9 in 0 in Fair
      8:52 AM 52 °F 39 °F 61 % WNW 5 mph - 29.91 in 0 in Fair
      9:52 AM 56 °F 38 °F 51 % NW 7 mph - 29.91 in 0 in Fair
      10:52 AM 59 °F 35 °F 41 % N 6 mph - 29.92 in 0 in Fair
      11:52 AM 60 °F 36 °F 41 % VAR 5 mph - 29.9 in 0 in Fair
      12:52 PM 61 °F 36 °F 39 % VAR 5 mph - 29.87 in 0 in Fair
      1:52 PM 63 °F 37 °F 38 % CALM 0 mph - 29.84 in 0 in Fair
      2:52 PM 63 °F 34 °F 34 % N 7 mph - 29.81 in 0 in Fair
      3:52 PM 64 °F 37 °F 37 % WNW 7 mph - 29.79 in 0 in Fair
      Level Access
      Glossary