Weather observations for the past three days for
Washington/Dulles International Airport, DC
Metric (Imperial)
Date Time (edt) Wind (kph) Vis. (km) Weather Sky Cond. Temperature (ºC) Relative Humidity Wind Chill (°C) Heat Index (°C) Pressure Precipitation (cm)
Air Dwpt 6 hour altimeter (cm) sea level (mb) 1 hr 3 hr 6 hr
Max. Min.
10 11:52 S 13 16.09 A Few Clouds FEW250 16.7 5.6 48% 77.01 1026.5
10 10:52 S 13 16.09 Fair CLR 15 5.6 54% 77.06 1027.2
10 09:52 Vrbl 9 16.09 A Few Clouds FEW250 11.7 6.7 72% 77.09 1027.9
10 08:52 S 11 16.09 A Few Clouds FEW250 9.4 6.1 80% 8 77.11 1028.2
10 07:52 SE 6 16.09 A Few Clouds FEW250 7.8 6.1 7.8 5.6 89% 77.17 1028.7
10 06:52 S 7 16.09 A Few Clouds FEW250 6.1 5 93% 5 77.14 1028.5
10 05:52 Calm 16.09 Fair CLR 6.1 5 93% 77.09 1027.9
10 04:52 SE 7 16.09 Fair CLR 6.1 5 93% 5 77.11 1028.2
10 03:52 SE 6 16.09 Fair CLR 6.7 5.6 93% 77.11 1028.2
10 02:52 S 6 16.09 Fair CLR 6.7 5.6 93% 77.14 1028.5
10 01:52 SE 7 16.09 Fair CLR 7.2 5 13.9 7.2 86% 6 77.19 1029.1
10 00:52 S 7 16.09 Fair CLR 8.3 5.6 83% 7 77.22 1029.4
09 23:52 S 7 16.09 Fair CLR 9.4 3.9 69% 9 77.24 1029.8
09 22:52 SE 6 16.09 Fair CLR 10.6 3.3 61% 77.24 1029.8
09 21:52 S 11 16.09 Fair CLR 11.7 3.3 57% 77.24 1029.9
09 20:52 S 9 16.09 Fair CLR 12.8 1.7 47% 77.22 1029.5
09 19:52 SE 11 16.09 A Few Clouds FEW250 13.9 1.7 17.2 13.9 44% 77.19 1029.1
09 18:52 SE 17 16.09 Partly Cloudy SCT250 16.1 0 34% 77.19 1029.3
09 17:52 S 11 G 28 16.09 Partly Cloudy SCT250 16.7 -0.6 31% 77.22 1029.4
09 16:52 SE 13 16.09 Partly Cloudy SCT250 16.7 -0.6 31% 77.24 1029.9
09 15:52 SE 19 G 39 16.09 Mostly Cloudy BKN250 16.1 -1.1 31% 77.29 1030.5
09 14:52 S 17 G 28 16.09 Mostly Cloudy BKN250 15 -2.2 31% 77.37 1031.5
09 13:52 SE 9 G 28 16.09 Mostly Cloudy BKN250 14.4 -1.7 15 3.9 33% 77.42 1032.2
09 12:52 SE 11 G 26 16.09 Mostly Cloudy BKN250 12.8 -1.7 37% 77.5 1033.3
09 11:52 SE 9 16.09 Mostly Cloudy BKN250 10.6 -1.1 45% 77.57 1034.5
09 10:52 SE 9 16.09 Mostly Cloudy BKN250 8.9 0 54% 8 77.62 1035.1
09 09:52 S 11 16.09 Mostly Cloudy FEW018 BKN250 7.2 0.6 63% 5 77.65 1035.4
09 08:52 S 11 16.09 Mostly Cloudy FEW016 BKN250 6.1 1.7 74% 4 77.67 1035.7
09 07:52 Vrbl 9 16.09 Mostly Cloudy BKN250 3.9 0.6 3.9 2.2 79% 2 77.65 1035.4
09 06:52 S 6 16.09 Mostly Cloudy FEW016 BKN250 2.8 0.6 86% 77.62 1035.0
09 05:52 S 6 16.09 Mostly Cloudy BKN016 3.3 0.6 83% 77.6 1034.8
09 04:52 SE 9 16.09 Overcast OVC015 3.9 0 76% 2 77.6 1034.5
09 03:52 SE 7 16.09 Overcast OVC016 3.3 -0.6 76% 2 77.6 1034.6
09 02:52 SE 7 16.09 Overcast OVC015 3.9 -0.6 73% 2 77.6 1034.7
09 01:52 S 7 16.09 Fair CLR 3.9 -1.1 8.9 3.9 70% 2 77.62 1034.9
09 00:52 SE 17 16.09 Fair CLR 5 -1.7 62% 2 77.62 1035.0
08 23:52 SE 11 16.09 Fair CLR 5.6 -3.3 53% 3 77.62 1034.8
08 22:52 SE 9 16.09 A Few Clouds FEW250 5.6 -4.4 49% 4 77.6 1034.8
08 21:52 SE 11 16.09 Partly Cloudy SCT250 7.2 -5 42% 5 77.6 1034.8
08 20:52 SE 15 16.09 Partly Cloudy SCT250 8.3 -7.2 33% 6 77.57 1034.2
08 19:52 SE 11 16.09 Partly Cloudy SCT250 8.9 -8.9 12.8 8.9 28% 7 77.5 1033.4
08 18:52 E 19 16.09 Mostly Cloudy BKN250 11.1 -10 22% 77.5 1033.2
08 17:52 E 15 16.09 Mostly Cloudy BKN250 12.2 -10.6 19% 77.5 1033.2
08 16:52 Vrbl 9 16.09 Partly Cloudy SCT250 12.2 -10.6 19% 77.52 1033.6
08 15:52 Calm 16.09 A Few Clouds FEW250 12.2 -8.9 22% 77.55 1034.0
08 14:52 Vrbl 9 16.09 A Few Clouds FEW250 10.6 -9.4 24% 77.6 1034.7
08 13:52 Vrbl 6 16.09 Fair CLR 10 -8.3 10 1.7 27% 77.65 1035.2
08 12:52 Vrbl 6 16.09 Fair CLR 8.9 -10.6 24% 77.7 1035.9
08 11:52 Calm 16.09 Fair CLR 7.2 -11.1 26% 77.75 1036.7
08 10:52 NE 9 16.09 Fair CLR 6.7 -10 30% 5 77.77 1037.0
08 09:52 Calm 16.09 Fair CLR 3.9 -10.6 34% 77.75 1036.8
08 08:52 N 9 16.09 Fair CLR 2.8 -8.9 42% 1 77.75 1036.7
08 07:52 N 11 16.09 Fair CLR 1.7 -8.9 3.9 0 46% -1 77.72 1036.3
08 06:52 NE 9 16.09 A Few Clouds FEW250 0 -8.9 52% -3 77.65 1035.3
08 05:52 NE 11 16.09 Fair CLR 0 -8.9 52% -3 77.57 1034.3
08 04:52 NE 7 16.09 Fair CLR 1.1 -8.9 48% -1 77.5 1033.4
08 03:52 N 15 16.09 Fair CLR 2.2 -9.4 42% -1 77.44 1032.5
08 02:52 NE 13 16.09 Fair CLR 3.3 -9.4 39% 0 77.42 1032.1
08 01:52 N 15 16.09 Fair CLR 3.9 -9.4 9.4 3.9 38% 1 77.39 1031.9
08 00:52 N 13 16.09 Fair CLR 3.9 -8.9 39% 1 77.42 1032.1
07 23:52 N 17 16.09 Fair CLR 6.1 -9.4 32% 3 77.37 1031.6
07 22:52 N 17 G 30 16.09 Fair CLR 6.7 -10.6 28% 4 77.34 1031.1
07 21:52 N 19 16.09 Fair CLR 7.8 -10.6 26% 5 77.29 1030.6
07 20:52 N 20 16.09 Fair CLR 8.9 -11.1 23% 6 77.22 1029.6
07 19:52 N 20 16.09 A Few Clouds FEW250 9.4 -12.8 13.3 9.4 20% 7 77.17 1028.7
07 18:52 N 22 16.09 A Few Clouds FEW250 10.6 -11.1 21% 77.11 1028.2
07 17:52 N 19 G 31 16.09 A Few Clouds FEW250 12.2 -10 20% 77.06 1027.4
07 16:52 N 22 G 33 16.09 A Few Clouds FEW250 12.8 -10 20% 76.99 1026.5
07 15:52 NW 22 G 43 16.09 A Few Clouds FEW250 13.3 -10 19% 76.99 1026.3
07 14:52 NW 19 G 39 16.09 A Few Clouds FEW080 FEW250 13.3 -9.4 20% 76.99 1026.4
07 13:52 N 28 G 43 16.09 A Few Clouds FEW060 FEW250 13.3 -7.8 13.3 8.9 22% 76.96 1026.1
07 12:52 W 24 G 46 16.09 A Few Clouds FEW060 FEW250 12.2 -5 30% 76.96 1025.9
Date Time (edt) Wind (kph) Vis. (km) Weather Sky Cond. Air Dwpt Max. Min. Relative Humidity Wind Chill (°C) Heat Index (°C) altimeter (cm) sea level (mb) 1 hr 3 hr 6 hr
6 hour
Temperature (ºC) Pressure Precipitation (cm)