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      Small Craft Advisory
      until 6:00 AM EDT
      Elev 387 ft, 38.972 °N 77.390 °W

      Herndon, VA

      Herndon Heights Station57°

      Summary

      Temperature (°F) Actual Historic Avg. Record
      High Temp664876
      Low Temp343013
      Day Average Temp47.13--
      Precipitation (in) Actual Historic Avg. Record
      Precipitation05.5-
      Dew Point (°F) Actual Historic Avg. Record
      Dew Point25.08--
      High32--
      Low12--
      Average25.08--
      Wind (mph) Actual Historic Avg. Record
      Max Wind Speed13--
      Visibility10--
      Sea Level Pressure (in) Actual Historic Avg. Record
      Sea Level Pressure29.58--
      Astronomy Day Length Rise Set
      Actual Time9h 30m7:16 AM4:47 PM
      Civil Twilight6:46 AM5:16 PM
      Nautical Twilight6:13 AM5:50 PM
      Astronomical Twilight5:40 AM6:22 PM
      Moon: First quarter12:36 PM-

      Daily Observations

      TimeTemperatureDew PointHumidityWindWind SpeedWind GustPressurePrecip.Condition
      12:52 AM 35 °F 12 °F 39 % SSW 7 mph - 29.61 in 0 in Cloudy
      1:52 AM 34 °F 13 °F 42 % SSW 6 mph - 29.59 in 0 in Mostly Cloudy
      2:52 AM 36 °F 14 °F 41 % SSW 7 mph - 29.58 in 0 in Cloudy
      3:52 AM 35 °F 15 °F 44 % S 7 mph - 29.56 in 0 in Cloudy
      4:52 AM 37 °F 16 °F 42 % S 5 mph - 29.56 in 0 in Cloudy
      5:52 AM 38 °F 17 °F 43 % S 7 mph - 29.54 in 0 in Partly Cloudy
      6:52 AM 38 °F 19 °F 47 % S 10 mph - 29.53 in 0 in Mostly Cloudy
      7:52 AM 38 °F 20 °F 48 % S 8 mph - 29.53 in 0 in Mostly Cloudy
      8:52 AM 43 °F 23 °F 45 % S 9 mph - 29.54 in 0 in Mostly Cloudy
      9:52 AM 50 °F 27 °F 41 % SSW 9 mph - 29.54 in 0 in Partly Cloudy
      10:52 AM 59 °F 30 °F 33 % SW 13 mph 21 mph 29.54 in 0 in Partly Cloudy
      11:52 AM 63 °F 30 °F 29 % W 10 mph - 29.54 in 0 in Mostly Cloudy
      12:52 PM 64 °F 30 °F 28 % W 9 mph - 29.53 in 0 in Mostly Cloudy
      1:52 PM 66 °F 31 °F 27 % W 12 mph - 29.53 in 0 in Mostly Cloudy
      2:52 PM 66 °F 31 °F 27 % WNW 9 mph - 29.54 in 0 in Mostly Cloudy
      3:52 PM 64 °F 32 °F 30 % WNW 8 mph - 29.55 in 0 in Mostly Cloudy
      4:52 PM 56 °F 31 °F 39 % SSW 8 mph - 29.58 in 0 in Mostly Cloudy
      5:52 PM 52 °F 31 °F 45 % SSW 5 mph - 29.6 in 0 in Partly Cloudy
      6:52 PM 51 °F 30 °F 44 % S 5 mph - 29.62 in 0 in Fair
      7:52 PM 44 °F 30 °F 58 % S 3 mph - 29.63 in 0 in Fair
      8:52 PM 42 °F 30 °F 62 % CALM 0 mph - 29.64 in 0 in Fair
      9:52 PM 42 °F 30 °F 62 % ESE 3 mph - 29.64 in 0 in Partly Cloudy
      10:52 PM 39 °F 30 °F 70 % CALM 0 mph - 29.65 in 0 in Partly Cloudy
      11:52 PM 39 °F 30 °F 70 % CALM 0 mph - 29.65 in 0 in Fair
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