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 September 19, Friday | 22 | 24.4 76 | 744.4 29.31 992.45 992.45 | 761.8 29.99 1015.65 1015.65 | 0.6 0.02 0.8 0.8 | 67 | Wind blowing from the north-east | Gentle breeze (5 m/s) (18 km/h) (11 miles/hour) (10 knots) (3 Bft) | 100%. 10/10. 8 oktas | 2000-2500 6562-8202 | 16.0 9.9 | 17.8 64 | |||||||||||||||||
19 | 27.2 81 | 743.8 29.28 991.65 991.65 | 761.3 29.97 1014.98 1014.98 | 0.0 0 0 0 | 49 | Wind blowing from the north-east | Light breeze (3 m/s) (11 km/h) (7 miles/hour) (6 knots) (2 Bft) | 100%. 10/10. 8 oktas | 19.4 67 | 31.7 89 | 2500 or more, or no clouds. 8202 or more, or no clouds. | 16.0 9.9 | 15.6 60 | ||||||||||||||||
16 | 29.4 85 | 743.8 29.28 991.65 991.65 | 761.2 29.97 1014.85 1014.85 | -0.8 -0.03 -1.07 -1.07 | 42 | Wind blowing from the south-west | Light breeze (3 m/s) (11 km/h) (7 miles/hour) (6 knots) (2 Bft) | 100%. 10/10. 8 oktas | 2500 or more, or no clouds. 8202 or more, or no clouds. | 16.0 9.9 | 15.0 59 | ||||||||||||||||||
13 | 31.7 89 | 744.6 29.31 992.72 992.72 | 762.0 30 1015.92 1015.92 | -0.5 -0.02 -0.67 -0.67 | 33 | Wind blowing from the south | Gentle breeze (5 m/s) (18 km/h) (11 miles/hour) (10 knots) (3 Bft) | 8 m/s 29 km/h 18 miles/hour 16 knots 5 Bft | 70 – 80%. 7/10 – 8/10. 6 oktas | 20.0 68 | 31.7 89 | 2500 or more, or no clouds. 8202 or more, or no clouds. | 16.0 9.9 | 13.3 56 | |||||||||||||||
10 | 26.1 79 | 745.1 29.33 993.39 993.39 | 762.5 30.02 1016.58 1016.58 | 0.3 0.01 0.4 0.4 | 52 | Wind blowing from the east-southeast | Light breeze (3 m/s) (11 km/h) (7 miles/hour) (6 knots) (2 Bft) | 50%. 5/10. 4 oktas | 2500 or more, or no clouds. 8202 or more, or no clouds. | 16.0 9.9 | 15.6 60 | ||||||||||||||||||
07 | 20.0 68 | 744.8 29.32 992.99 992.99 | 762.4 30.02 1016.45 1016.45 | 0.0 0 0 0 | 78 | Wind blowing from the east | Light breeze (2 m/s) (7 km/h) (4 mph) (4 knots) (2 Bft) | 70 – 80%. 7/10 – 8/10. 6 oktas | 19.4 67 | 30.6 87 | 2500 or more, or no clouds. 8202 or more, or no clouds. | 16.0 9.9 | 16.1 61 | ||||||||||||||||
04 | 20.0 68 | 744.8 29.32 992.99 992.99 | 762.3 30.01 1016.32 1016.32 | -0.3 -0.01 -0.4 -0.4 | 84 | Wind blowing from the north-east | Light breeze (3 m/s) (11 km/h) (7 miles/hour) (6 knots) (2 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 | 17.2 63 | ||||||||||||||||||
01 | 21.1 70 | 745.1 29.33 993.39 993.39 | 762.5 30.02 1016.58 1016.58 | 0.0 0 0 0 | 76 | Wind blowing from the east | Light breeze (3 m/s) (11 km/h) (7 miles/hour) (6 knots) (2 Bft) | 50%. 5/10. 4 oktas | 16.7 62 | 25.0 77 | 2500 or more, or no clouds. 8202 or more, or no clouds. | 16.0 9.9 | 16.7 62 | ||||||||||||||||
| September 18, Thursday | 22 | 22.2 72 | 745.1 29.33 993.39 993.39 | 762.7 30.03 1016.85 1016.85 | 0.5 0.02 0.67 0.67 | 64 | Wind blowing from the east | 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 | 15.0 59 | |||||||||||||||||