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      Elev 387 ft, 38.972 °N 77.390 °W

      Herndon, VA

      Summary

      Temperature (°F) Actual Historic Avg. Record
      High Temp868299
      Low Temp516043
      Day Average Temp71.6--
      Precipitation (in) Actual Historic Avg. Record
      Precipitation04.9-
      Dew Point (°F) Actual Historic Avg. Record
      Dew Point47.48--
      High52--
      Low45--
      Average47.48--
      Wind (mph) Actual Historic Avg. Record
      Max Wind Speed10--
      Visibility10--
      Sea Level Pressure (in) Actual Historic Avg. Record
      Sea Level Pressure29.51--
      Astronomy Day Length Rise Set
      Actual Time14h 50m5:43 AM8:34 PM
      Civil Twilight5:11 AM9:06 PM
      Nautical Twilight4:31 AM9:46 PM
      Astronomical Twilight3:45 AM10:32 PM
      Moon: Last quarter1:31 AM12:49 PM

      Daily Observations

      TimeTemperatureDew PointHumidityWindWind SpeedWind GustPressurePrecip.Condition
      12:52 AM 58 °F 48 °F 70 % CALM 0 mph - 29.52 in 0 in Partly Cloudy
      1:52 AM 53 °F 47 °F 80 % CALM 0 mph - 29.51 in 0 in Fair
      2:52 AM 53 °F 48 °F 83 % CALM 0 mph - 29.51 in 0 in Fair
      3:52 AM 53 °F 48 °F 83 % S 3 mph - 29.5 in 0 in Fair
      4:52 AM 51 °F 47 °F 86 % CALM 0 mph - 29.51 in 0 in Fair
      5:52 AM 54 °F 48 °F 80 % SW 3 mph - 29.52 in 0 in Fair
      6:52 AM 54 °F 50 °F 86 % CALM 0 mph - 29.53 in 0 in Fair
      7:52 AM 66 °F 52 °F 60 % SSW 3 mph - 29.54 in 0 in Fair
      8:52 AM 72 °F 49 °F 44 % W 7 mph - 29.54 in 0 in Fair
      9:52 AM 75 °F 47 °F 37 % WNW 9 mph - 29.54 in 0 in Fair
      10:52 AM 78 °F 46 °F 32 % NW 10 mph 18 mph 29.54 in 0 in Fair
      11:52 AM 81 °F 46 °F 29 % WNW 10 mph 21 mph 29.53 in 0 in Fair
      12:52 PM 82 °F 47 °F 29 % NNW 9 mph - 29.53 in 0 in Fair
      1:11 PM 83 °F 46 °F 27 % NW 8 mph 18 mph 29.52 in 0 in Fair
      1:52 PM 84 °F 45 °F 25 % NW 7 mph - 29.51 in 0 in Partly Cloudy
      2:52 PM 84 °F 46 °F 26 % WNW 7 mph 18 mph 29.5 in 0 in Partly Cloudy
      3:52 PM 86 °F 45 °F 24 % SW 10 mph - 29.49 in 0 in Fair
      4:52 PM 85 °F 45 °F 25 % VAR 6 mph - 29.49 in 0 in Fair
      5:52 PM 85 °F 45 °F 25 % WSW 9 mph - 29.48 in 0 in Fair
      6:52 PM 83 °F 46 °F 27 % SSW 7 mph - 29.49 in 0 in Partly Cloudy
      7:52 PM 79 °F 48 °F 34 % SSW 5 mph - 29.49 in 0 in Partly Cloudy
      8:52 PM 76 °F 48 °F 37 % S 6 mph - 29.5 in 0 in Fair
      9:52 PM 73 °F 48 °F 41 % SSE 5 mph - 29.52 in 0 in Partly Cloudy
      10:52 PM 72 °F 50 °F 46 % SSE 5 mph - 29.53 in 0 in Partly Cloudy
      11:52 PM 70 °F 52 °F 53 % SSE 6 mph - 29.53 in 0 in Mostly Cloudy
      Level Access
      Glossary