Weather archive in Washington / Dulles (airport)
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| Date / Local time | T | Po | P | Pa | U | DD | Ff | ff10 | ff3 | N | WW | W1 | W2 | Tn | Tx | Cl | Nh | H | Cm | Ch | VV | Td | RRR | tR | E | Tg | E' | sss | |
| 2025 September 17, Wednesday | 02 | 15.6 60 | 755.1 29.73 1006.72 1006.72 | 763.3 30.05 1017.65 1017.65 | -1.8 -0.07 -2.4 -2.4 | 84 | Wind blowing from the north | Fresh breeze (8 m/s) (29 km/h) (18 miles/hour) (16 knots) (5 Bft) | 11 m/s 40 km/h 25 miles/hour 21 mile/hour 6 Bft | 100%. 10/10. 8 oktas | Rain, not freezing, continuous, slight at time of observation. | 15.0 59 | 20.0 68 | 600-1000 1968-3281 | 9.0 5.6 | 12.8 55 | 6.0 0.24 | 6 | |||||||||||
| September 16, Tuesday | 23 | 15.0 59 | 756.9 29.8 1009.12 1009.12 | 765.3 30.13 1020.32 1020.32 | -0.2 -0.01 -0.27 -0.27 | 83 | Wind blowing from the north | Gentle breeze (5 m/s) (18 km/h) (11 miles/hour) (10 knots) (3 Bft) | 10 m/s 36 km/h 22 mph 19 knots 5 Bft | 100%. 10/10. 8 oktas | 600-1000 1968-3281 | 11.0 6.8 | 12.2 54 | 5.0 0.2 | 3 | ||||||||||||||
20 | 16.1 61 | 757.1 29.81 1009.38 1009.38 | 765.4 30.13 1020.45 1020.45 | -0.8 -0.03 -1.07 -1.07 | 87 | Wind blowing from the north | Moderate breeze (6 m/s) (22 km/h) (13 miles/hour) (12 knots) (4 Bft) | 100%. 10/10. 8 oktas | Rain, not freezing, continuous, slight at time of observation. | 15.6 60 | 23.9 75 | 300-600 984-1968 | 11.0 6.8 | 13.9 57 | 12.0 0.47 | 6 | |||||||||||||
17 | 16.7 62 | 757.9 29.84 1010.45 1010.45 | 766.1 30.16 1021.38 1021.38 | 0.3 0.01 0.4 0.4 | 84 | Wind blowing from the north-northeast | Gentle breeze (4 m/s) (14 km/h) (9 miles/hour) (8 knots) (3 Bft) | 100%. 10/10. 8 oktas | Rain, not freezing, continuous, slight at time of observation. | 1500-2000 4921-6562 | 9.0 5.6 | 13.9 57 | 0.5 0.02 | 3 | |||||||||||||||
14 | 22.8 73 | 757.6 29.83 1010.05 1010.05 | 765.7 30.15 1020.85 1020.85 | -0.8 -0.03 -1.07 -1.07 | 51 | Wind blowing from the east-northeast | Moderate breeze (7 m/s) (25 km/h) (16 miles/hour) (14 knots) (4 Bft) | 70 – 80%. 7/10 – 8/10. 6 oktas | 18.3 65 | 23.9 75 | 1000-1500 3281-4921 | 16.0 9.9 | 12.2 54 | ||||||||||||||||
11 | 21.7 71 | 758.4 29.86 1011.12 1011.12 | 766.7 30.19 1022.18 1022.18 | -0.5 -0.02 -0.67 -0.67 | 55 | Wind blowing from the north-east | Gentle breeze (5 m/s) (18 km/h) (11 miles/hour) (10 knots) (3 Bft) | 10 m/s 36 km/h 22 mph 19 knots 5 Bft | 100%. 10/10. 8 oktas | 1500-2000 4921-6562 | 16.0 9.9 | 12.2 54 | |||||||||||||||||
08 | 18.3 65 | 758.9 29.88 1011.78 1011.78 | 767.1 30.2 1022.72 1022.72 | 0.5 0.02 0.67 0.67 | 70 | Wind blowing from the north-northeast | Gentle breeze (4 m/s) (14 km/h) (9 miles/hour) (8 knots) (3 Bft) | 70 – 80%. 7/10 – 8/10. 6 oktas | 18.3 65 | 2500 or more, or no clouds. 8202 or more, or no clouds. | 16.0 9.9 | 12.8 55 | Trace of precipitation Trace of precipitation | 6 | |||||||||||||||
05 | 18.9 66 | 758.4 29.86 1011.12 1011.12 | 766.5 30.18 1021.92 1021.92 | -0.2 -0.01 -0.27 -0.27 | 65 | Wind blowing from the north-northeast | Gentle breeze (4 m/s) (14 km/h) (9 miles/hour) (8 knots) (3 Bft) | 100%. 10/10. 8 oktas | 2500 or more, or no clouds. 8202 or more, or no clouds. | 16.0 9.9 | 12.2 54 | ||||||||||||||||||
02 | 20.0 68 | 758.6 29.87 1011.38 1011.38 | 766.8 30.19 1022.32 1022.32 | 0.0 0 0 0 | 63 | Wind blowing from the north-northeast | Light breeze (3 m/s) (11 km/h) (7 miles/hour) (6 knots) (2 Bft) | 100%. 10/10. 8 oktas | 15.0 59 | 22.2 72 | 2500 or more, or no clouds. 8202 or more, or no clouds. | 16.0 9.9 | 12.8 55 | ||||||||||||||||