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      Elev 114 ft, 38.960 °N 77.382 °W

      Herndon, VA

      Summary

      Temperature (°F) Actual Historic Avg. Record
      High Temp656581
      Low Temp404227
      Day Average Temp50.63--
      Precipitation (in) Actual Historic Avg. Record
      Precipitation04.1-
      Dew Point (°F) Actual Historic Avg. Record
      Dew Point42.25--
      High46--
      Low39--
      Average42.25--
      Wind (mph) Actual Historic Avg. Record
      Max Wind Speed6--
      Visibility10--
      Sea Level Pressure (in) Actual Historic Avg. Record
      Sea Level Pressure30.22--
      Astronomy Day Length Rise Set
      Actual Time10h 47m7:29 AM6:17 PM
      Civil Twilight7:02 AM6:44 PM
      Nautical Twilight6:30 AM7:15 PM
      Astronomical Twilight5:59 AM7:46 PM
      Moon: Waxing gibbous5:43 PM6:51 AM

      Daily Observations

      TimeTemperatureDew PointHumidityWindWind SpeedWind GustPressurePrecip.Condition
      12:52 AM 42 °F 40 °F 92 % CALM 0 mph - 30.21 in 0 in Partly Cloudy
      1:52 AM 42 °F 40 °F 92 % CALM 0 mph - 30.21 in 0 in Mostly Cloudy
      2:52 AM 44 °F 41 °F 89 % CALM 0 mph - 30.21 in 0 in Cloudy
      3:52 AM 46 °F 42 °F 86 % NNW 5 mph - 30.21 in 0 in Cloudy
      4:52 AM 46 °F 42 °F 86 % NW 3 mph - 30.21 in 0 in Mostly Cloudy
      5:52 AM 42 °F 40 °F 92 % CALM 0 mph - 30.22 in 0 in Fair
      6:52 AM 40 °F 39 °F 97 % CALM 0 mph - 30.23 in 0 in Fair
      7:52 AM 41 °F 40 °F 96 % CALM 0 mph - 30.24 in 0 in Fair
      8:52 AM 46 °F 41 °F 83 % NNW 5 mph - 30.26 in 0 in Fair
      9:52 AM 50 °F 42 °F 74 % NNW 6 mph - 30.27 in 0 in Fair
      10:52 AM 55 °F 45 °F 69 % N 5 mph - 30.26 in 0 in Fair
      11:52 AM 60 °F 46 °F 60 % NNW 5 mph - 30.25 in 0 in Fair
      12:52 PM 63 °F 45 °F 52 % CALM 0 mph - 30.23 in 0 in Fair
      1:52 PM 63 °F 44 °F 50 % VAR 6 mph - 30.19 in 0 in Fair
      2:52 PM 65 °F 45 °F 48 % VAR 6 mph - 30.16 in 0 in Fair
      3:52 PM 65 °F 44 °F 47 % VAR 3 mph - 30.15 in 0 in Fair
      Level Access
      Glossary