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 August 20, Thursday	23	21.1 70	754.9 29.72 1006.45 1006.45	763.0 30.04 1017.25 1017.25	2.3 0.09 3.07 3.07	73	Wind blowing from the north	Moderate breeze (6 m/s) (22 km/h) (13 miles/hour) (12 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								1000-1500 3281-4921			16.0 9.9	16.1 61
	20	22.8 73	752.6 29.63 1003.38 1003.38	760.8 29.95 1014.32 1014.32	1.5 0.06 2 2	69	Wind blowing from the north	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		50%. 5/10. 4 oktas				22.2 72	31.7 89			1500-2000 4921-6562			16.0 9.9	16.7 62	16.0 0.63	6
	17	23.9 75	751.1 29.57 1001.38 1001.38	759.1 29.89 1012.05 1012.05	-0.8 -0.03 -1.07 -1.07	88	Wind blowing from the south-southwest	Light breeze (2 m/s) (7 km/h) (4 mph) (4 knots) (2 Bft)			70 – 80%. 7/10 – 8/10. 6 oktas	Rain, not freezing, continuous, heavy at time of observation.							300-600 984-1968			2.4 1.5	21.7 71	12.0 0.47	3
	14	28.9 84	751.9 29.6 1002.45 1002.45	760.0 29.92 1013.25 1013.25	-0.9 -0.04 -1.2 -1.2	70	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				23.9 75	30.6 87			600-1000 1968-3281			16.0 9.9	22.8 73	Trace of precipitation Trace of precipitation	6
	11	26.1 79	752.8 29.64 1003.65 1003.65	760.9 29.96 1014.45 1014.45	0.2 0.01 0.27 0.27	79	Wind blowing from the south-southeast	Light breeze (2 m/s) (7 km/h) (4 mph) (4 knots) (2 Bft)			70 – 80%. 7/10 – 8/10. 6 oktas								300-600 984-1968			16.0 9.9	22.2 72	Trace of precipitation Trace of precipitation	3
	08	23.9 75	752.6 29.63 1003.38 1003.38	760.8 29.95 1014.32 1014.32	0.0 0 0 0	79	Wind blowing from the east	Gentle breeze (4 m/s) (14 km/h) (9 miles/hour) (8 knots) (3 Bft)			100%. 10/10. 8 oktas				21.1 70	31.7 89			2500 or more, or no clouds. 8202 or more, or no clouds.			16.0 9.9	20.0 68
	05	22.8 73	752.6 29.63 1003.38 1003.38	760.6 29.94 1014.05 1014.05	-0.5 -0.02 -0.67 -0.67	87	Calm, no wind	Calm			100%. 10/10. 8 oktas								1000-1500 3281-4921			16.0 9.9	20.6 69
	02	22.2 72	753.1 29.65 1004.05 1004.05	761.1 29.96 1014.72 1014.72	0.5 0.02 0.67 0.67	87	Calm, no wind	Calm			100%. 10/10. 8 oktas				16.7 62	26.7 80			2500 or more, or no clouds. 8202 or more, or no clouds.			16.0 9.9	20.0 68