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 December 21, Sunday | 16 | 8.3 47 | 759.9 29.92 1013.12 1013.12 | 768.3 30.25 1024.32 1024.32 | 1.3 0.05 1.73 1.73 | 23 | Wind blowing from the north-west | Fresh breeze (8 m/s) (29 km/h) (18 miles/hour) (16 knots) (5 Bft) | 13 m/s 47 km/h 29 miles/hour 25 knots 6 Bft | 70 – 80%. 7/10 – 8/10. 6 oktas | 2500 or more, or no clouds. 8202 or more, or no clouds. | 16.0 9.9 | -11.7 11 | ||||||||||||||||
13 | 8.3 47 | 758.6 29.87 1011.38 1011.38 | 767.0 30.2 1022.58 1022.58 | 1.2 0.05 1.6 1.6 | 26 | Wind blowing from the west-northwest | Moderate breeze (7 m/s) (25 km/h) (16 miles/hour) (14 knots) (4 Bft) | 11 m/s 40 km/h 25 miles/hour 21 mile/hour 6 Bft | 70 – 80%. 7/10 – 8/10. 6 oktas | 0.6 33 | 8.3 47 | 2500 or more, or no clouds. 8202 or more, or no clouds. | 16.0 9.9 | -10.0 14 | |||||||||||||||
10 | 8.3 47 | 757.4 29.82 1009.78 1009.78 | 765.8 30.15 1020.98 1020.98 | 2.3 0.09 3.07 3.07 | 24 | Wind blowing from the north-west | Fresh breeze (9 m/s) (32 km/h) (20 miles/hour) (17 knots) (5 Bft) | 15 m/s 54 km/h 34 mph 29 knots 7 Bft | 70 – 80%. 7/10 – 8/10. 6 oktas | 2500 or more, or no clouds. 8202 or more, or no clouds. | 16.0 9.9 | -11.1 12 | |||||||||||||||||
07 | 1.1 34 | 755.1 29.73 1006.72 1006.72 | 763.5 30.06 1017.92 1017.92 | 1.2 0.05 1.6 1.6 | 64 | Wind blowing from the south | Light breeze (2 m/s) (7 km/h) (4 mph) (4 knots) (2 Bft) | 50%. 5/10. 4 oktas | -0.6 31 | 7.8 46 | 2500 or more, or no clouds. 8202 or more, or no clouds. | 16.0 9.9 | -5.0 23 | ||||||||||||||||
04 | 2.8 37 | 753.9 29.68 1005.12 1005.12 | 762.2 30.01 1016.18 1016.18 | 0.5 0.02 0.67 0.67 | 57 | Wind blowing from the south | Light breeze (3 m/s) (11 km/h) (7 miles/hour) (6 knots) (2 Bft) | no clouds no clouds no clouds | 16.0 9.9 | -5.0 23 | |||||||||||||||||||
01 | 4.4 40 | 753.4 29.66 1004.45 1004.45 | 761.8 29.99 1015.65 1015.65 | -0.9 -0.04 -1.2 -1.2 | 53 | Wind blowing from the south | Gentle breeze (4 m/s) (14 km/h) (9 miles/hour) (8 knots) (3 Bft) | no clouds no clouds no clouds | 5.6 42 | 16.0 9.9 | -4.4 24 | ||||||||||||||||||
| December 20, Saturday | 22 | 5.0 41 | 754.3 29.7 1005.65 1005.65 | 763.0 30.04 1017.25 1017.25 | -1.5 -0.06 -2 -2 | 51 | Wind blowing from the south | Gentle breeze (4 m/s) (14 km/h) (9 miles/hour) (8 knots) (3 Bft) | 20–30%. 2/10–3/10. 2 oktas | 2500 or more, or no clouds. 8202 or more, or no clouds. | 16.0 9.9 | -4.4 24 | |||||||||||||||||
19 | 3.9 39 | 755.8 29.76 1007.65 1007.65 | 764.6 30.1 1019.38 1019.38 | -0.6 -0.02 -0.8 -0.8 | 55 | Wind blowing from the south | Gentle breeze (4 m/s) (14 km/h) (9 miles/hour) (8 knots) (3 Bft) | 20–30%. 2/10–3/10. 2 oktas | -4.9 23 | 7.8 46 | 2500 or more, or no clouds. 8202 or more, or no clouds. | 16.0 9.9 | -4.4 24 | ||||||||||||||||
16 | 6.7 44 | 756.4 29.78 1008.45 1008.45 | 765.0 30.12 1019.92 1019.92 | -1.8 -0.07 -2.4 -2.4 | 43 | Wind blowing from the south-southeast | Gentle breeze (4 m/s) (14 km/h) (9 miles/hour) (8 knots) (3 Bft) | 50%. 5/10. 4 oktas | 2500 or more, or no clouds. 8202 or more, or no clouds. | 16.0 9.9 | -5.0 23 | ||||||||||||||||||