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 | |
| 2026 July 31, Friday | 10 | 26.7 80 | 742.9 29.25 990.45 990.45 | 760.3 29.93 1013.65 1013.65 | -0.9 -0.04 -1.2 -1.2 | 56 | Wind blowing from the south-southeast | Moderate breeze (6 m/s) (22 km/h) (13 miles/hour) (12 knots) (4 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 | |||||||||||||||||
07 | 22.2 72 | 743.8 29.28 991.65 991.65 | 761.3 29.97 1014.98 1014.98 | 0.0 0 0 0 | 71 | Wind blowing from the south | Light breeze (2 m/s) (7 km/h) (4 mph) (4 knots) (2 Bft) | 70 – 80%. 7/10 – 8/10. 6 oktas | 21.1 70 | 30.6 87 | 2500 or more, or no clouds. 8202 or more, or no clouds. | 16.0 9.9 | 16.7 62 | ||||||||||||||||
04 | 21.7 71 | 743.8 29.28 991.65 991.65 | 761.4 29.98 1015.12 1015.12 | -0.6 -0.02 -0.8 -0.8 | 73 | 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 | 2500 or more, or no clouds. 8202 or more, or no clouds. | 16.0 9.9 | 16.7 62 | ||||||||||||||||||
01 | 23.3 74 | 744.4 29.31 992.45 992.45 | 761.9 30 1015.78 1015.78 | -0.7 -0.03 -0.93 -0.93 | 67 | Wind blowing from the south-west | Light breeze (2 m/s) (7 km/h) (4 mph) (4 knots) (2 Bft) | 70 – 80%. 7/10 – 8/10. 6 oktas | 17.2 63 | 28.3 83 | 2500 or more, or no clouds. 8202 or more, or no clouds. | 16.0 9.9 | 16.7 62 | ||||||||||||||||
| July 30, Thursday | 22 | 25.6 78 | 745.1 29.33 993.39 993.39 | 762.5 30.02 1016.58 1016.58 | 0.7 0.03 0.93 0.93 | 56 | Wind blowing from the west | Light breeze (2 m/s) (7 km/h) (4 mph) (4 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 | 16.1 61 | |||||||||||||||||
19 | 28.3 83 | 744.4 29.31 992.45 992.45 | 761.9 30 1015.78 1015.78 | -0.7 -0.03 -0.93 -0.93 | 44 | Wind blowing from the west-southwest | Light breeze (3 m/s) (11 km/h) (7 miles/hour) (6 knots) (2 Bft) | 70 – 80%. 7/10 – 8/10. 6 oktas | 17.2 63 | 30.6 87 | 2500 or more, or no clouds. 8202 or more, or no clouds. | 16.0 9.9 | 15.0 59 | ||||||||||||||||
16 | 30.0 86 | 745.1 29.33 993.39 993.39 | 762.6 30.02 1016.72 1016.72 | -0.7 -0.03 -0.93 -0.93 | 36 | Wind blowing from the south-west | Light breeze (3 m/s) (11 km/h) (7 miles/hour) (6 knots) (2 Bft) | 70 – 80%. 7/10 – 8/10. 6 oktas | 1000-1500 3281-4921 | 16.0 9.9 | 13.3 56 | ||||||||||||||||||
13 | 29.4 85 | 745.8 29.36 994.32 994.32 | 763.4 30.06 1017.78 1017.78 | -0.5 -0.02 -0.67 -0.67 | 39 | Light breeze (2 m/s) (7 km/h) (4 mph) (4 knots) (2 Bft) | 70 – 80%. 7/10 – 8/10. 6 oktas | 18.9 66 | 29.4 85 | 2500 or more, or no clouds. 8202 or more, or no clouds. | 16.0 9.9 | 13.9 57 | |||||||||||||||||
10 | 26.1 79 | 746.3 29.38 994.99 994.99 | 763.9 30.07 1018.45 1018.45 | 0.7 0.03 0.93 0.93 | 44 | Light breeze (2 m/s) (7 km/h) (4 mph) (4 knots) (2 Bft) | 50%. 5/10. 4 oktas | 2500 or more, or no clouds. 8202 or more, or no clouds. | 16.0 9.9 | 12.8 55 | |||||||||||||||||||