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 | |
| 2026 September 20, Sunday | 14 | 26.7 80 | 752.1 29.61 1002.72 1002.72 | 760.3 29.93 1013.65 1013.65 | -1.0 -0.04 -1.33 -1.33 | 69 | Wind blowing from the south-southwest | Light breeze (3 m/s) (11 km/h) (7 miles/hour) (6 knots) (2 Bft) | 70 – 80%. 7/10 – 8/10. 6 oktas | 20.6 69 | 27.2 81 | 600-1000 1968-3281 | 16.0 9.9 | 20.6 69 | Trace of precipitation Trace of precipitation | 6 | |||||||||||||
11 | 23.9 75 | 753.1 29.65 1004.05 1004.05 | 761.2 29.97 1014.85 1014.85 | -0.5 -0.02 -0.67 -0.67 | 76 | Wind blowing from the south-southwest | Gentle breeze (4 m/s) (14 km/h) (9 miles/hour) (8 knots) (3 Bft) | 8 m/s 29 km/h 18 miles/hour 16 knots 5 Bft | 70 – 80%. 7/10 – 8/10. 6 oktas | 600-1000 1968-3281 | 16.0 9.9 | 19.4 67 | Trace of precipitation Trace of precipitation | 3 | |||||||||||||||
08 | 20.6 69 | 753.6 29.67 1004.72 1004.72 | 761.8 29.99 1015.65 1015.65 | 0.2 0.01 0.27 0.27 | 87 | Wind blowing from the south-southwest | Gentle breeze (5 m/s) (18 km/h) (11 miles/hour) (10 knots) (3 Bft) | 70 – 80%. 7/10 – 8/10. 6 oktas | Rain, not freezing, continuous, slight at time of observation. | 20.6 69 | 26.1 79 | 1000-1500 3281-4921 | 4.8 3.0 | 18.3 65 | 2.0 0.08 | 6 | |||||||||||||
05 | 21.7 71 | 753.4 29.66 1004.45 1004.45 | 761.4 29.98 1015.12 1015.12 | -0.9 -0.04 -1.2 -1.2 | 81 | Wind blowing from the south | Gentle breeze (4 m/s) (14 km/h) (9 miles/hour) (8 knots) (3 Bft) | 100%. 10/10. 8 oktas | 1000-1500 3281-4921 | 16.0 9.9 | 18.3 65 | ||||||||||||||||||
02 | 22.2 72 | 754.3 29.7 1005.65 1005.65 | 762.5 30.02 1016.58 1016.58 | -1.1 -0.04 -1.47 -1.47 | 79 | Wind blowing from the south | Gentle breeze (4 m/s) (14 km/h) (9 miles/hour) (8 knots) (3 Bft) | 100%. 10/10. 8 oktas | 18.3 65 | 23.9 75 | 1000-1500 3281-4921 | 16.0 9.9 | 18.3 65 | ||||||||||||||||
| September 19, Saturday | 23 | 22.8 73 | 755.4 29.74 1007.12 1007.12 | 763.5 30.06 1017.92 1017.92 | 0.3 0.01 0.4 0.4 | 76 | Wind blowing from the south-east | Gentle breeze (4 m/s) (14 km/h) (9 miles/hour) (8 knots) (3 Bft) | 100%. 10/10. 8 oktas | 1000-1500 3281-4921 | 16.0 9.9 | 18.3 65 | |||||||||||||||||
20 | 23.9 75 | 755.1 29.73 1006.72 1006.72 | 763.4 30.06 1017.78 1017.78 | -0.3 -0.01 -0.4 -0.4 | 69 | Wind blowing from the south-east | 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 | 26.1 79 | 1000-1500 3281-4921 | 16.0 9.9 | 17.8 64 | ||||||||||||||||
17 | 25.6 78 | 755.4 29.74 1007.12 1007.12 | 763.5 30.06 1017.92 1017.92 | -1.0 -0.04 -1.33 -1.33 | 60 | Wind blowing from the east-southeast | Light breeze (3 m/s) (11 km/h) (7 miles/hour) (6 knots) (2 Bft) | 100%. 10/10. 8 oktas | 1000-1500 3281-4921 | 16.0 9.9 | 17.2 63 | ||||||||||||||||||
14 | 25.0 77 | 756.4 29.78 1008.45 1008.45 | 764.5 30.1 1019.25 1019.25 | -1.0 -0.04 -1.33 -1.33 | 60 | Wind blowing from the south-southwest | Light breeze (3 m/s) (11 km/h) (7 miles/hour) (6 knots) (2 Bft) | 70 – 80%. 7/10 – 8/10. 6 oktas | 18.3 65 | 25.6 78 | 1000-1500 3281-4921 | 16.0 9.9 | 16.7 62 | ||||||||||||||||