Weather archive in Chicago / O'Hare (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 July 21, Monday	04	17.8 64	745.1 29.33 993.39 993.39	762.8 30.03 1016.98 1016.98	0.3 0.01 0.4 0.4	93	Wind blowing from the north	Light breeze (3 m/s) (11 km/h) (7 miles/hour) (6 knots) (2 Bft)			70 – 80%. 7/10 – 8/10. 6 oktas	Mist.							1500-2000 4921-6562			9.0 5.6	16.7 62
2025 July 21, Monday	01	18.9 66	744.8 29.32 992.99 992.99	762.4 30.02 1016.45 1016.45	0.0 0 0 0	81	Wind blowing from the north-east	Light breeze (2 m/s) (7 km/h) (4 mph) (4 knots) (2 Bft)			20–30%. 2/10–3/10. 2 oktas				18.9 66	23.9 75			2500 or more, or no clouds. 8202 or more, or no clouds.			12.0 7.5	15.6 60
July 20, Sunday	22	20.0 68	744.8 29.32 992.99 992.99	762.6 30.02 1016.72 1016.72	0.7 0.03 0.93 0.93	81	Wind blowing from the north-northeast	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	16.7 62
	19	22.8 73	744.1 29.3 992.05 992.05	761.7 29.99 1015.52 1015.52	0.0 0 0 0	59	Wind blowing from the north-northeast	Gentle breeze (5 m/s) (18 km/h) (11 miles/hour) (10 knots) (3 Bft)			70 – 80%. 7/10 – 8/10. 6 oktas				20.0 68	23.3 74			2000-2500 6562-8202			16.0 9.9	14.4 58
	16	22.2 72	744.1 29.3 992.05 992.05	761.8 29.99 1015.65 1015.65	0.3 0.01 0.4 0.4	76	Wind blowing from the north-northeast	Moderate breeze (6 m/s) (22 km/h) (13 miles/hour) (12 knots) (4 Bft)			100%. 10/10. 8 oktas								300-600 984-1968			16.0 9.9	17.8 64
	13	22.8 73	743.8 29.28 991.65 991.65	761.3 29.97 1014.98 1014.98	0.2 0.01 0.27 0.27	76	Wind blowing from the north-northeast	Moderate breeze (7 m/s) (25 km/h) (16 miles/hour) (14 knots) (4 Bft)			70 – 80%. 7/10 – 8/10. 6 oktas				20.6 69	23.9 75			300-600 984-1968			16.0 9.9	18.3 65	Trace of precipitation Trace of precipitation	6
	10	20.6 69	743.6 29.28 991.39 991.39	761.0 29.96 1014.58 1014.58	0.3 0.01 0.4 0.4	87	Wind blowing from the north-northeast	Fresh breeze (8 m/s) (29 km/h) (18 miles/hour) (16 knots) (5 Bft)			100%. 10/10. 8 oktas	Rain, not freezing, continuous, slight at time of observation.							300-600 984-1968			16.0 9.9	18.3 65	Trace of precipitation Trace of precipitation	3
	07	20.6 69	743.3 29.26 990.99 990.99	760.9 29.96 1014.45 1014.45	1.5 0.06 2 2	87	Wind blowing from the north-northeast	Moderate breeze (6 m/s) (22 km/h) (13 miles/hour) (12 knots) (4 Bft)			100%. 10/10. 8 oktas				20.0 68	28.3 83			200-300 656-984			16.0 9.9	18.3 65
	04	22.8 73	741.8 29.2 988.99 988.99	759.2 29.89 1012.18 1012.18	0.0 0 0 0	90	Wind blowing from the north	Gentle breeze (4 m/s) (14 km/h) (9 miles/hour) (8 knots) (3 Bft)			70 – 80%. 7/10 – 8/10. 6 oktas								200-300 656-984			16.0 9.9	21.1 70