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 October 20, Tuesday | 19 | 15.0 59 | 752.1 29.61 1002.72 1002.72 | 770.3 30.33 1026.98 1026.98 | 0.0 0 0 0 | 62 | Wind blowing from the east | Light breeze (2 m/s) (7 km/h) (4 mph) (4 knots) (2 Bft) | no clouds no clouds no clouds | 6.7 44 | 20.6 69 | 16.0 9.9 | 7.8 46 | ||||||||||||||||
16 | 20.6 69 | 752.1 29.61 1002.72 1002.72 | 770.2 30.32 1026.85 1026.85 | -1.2 -0.05 -1.6 -1.6 | 36 | Wind blowing from the east-northeast | 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 41 | |||||||||||||||||||
13 | 19.4 67 | 753.3 29.66 1004.32 1004.32 | 771.4 30.37 1028.45 1028.45 | -1.0 -0.04 -1.33 -1.33 | 39 | Wind blowing from the south-southeast | Light breeze (2 m/s) (7 km/h) (4 mph) (4 knots) (2 Bft) | no clouds no clouds no clouds | 7.2 45 | 19.4 67 | 16.0 9.9 | 5.0 41 | |||||||||||||||||
10 | 12.8 55 | 754.3 29.7 1005.65 1005.65 | 772.4 30.41 1029.78 1029.78 | 0.5 0.02 0.67 0.67 | 87 | Calm, no wind | Calm | 20–30%. 2/10–3/10. 2 oktas | Mist. | 2500 or more, or no clouds. 8202 or more, or no clouds. | 9.0 5.6 | 10.6 51 | |||||||||||||||||
07 | 8.3 47 | 753.8 29.68 1004.98 1004.98 | 772.1 30.4 1029.38 1029.38 | 0.5 0.02 0.67 0.67 | 97 | Calm, no wind | Calm | 70 – 80%. 7/10 – 8/10. 6 oktas | Fog or ice fog in patches. | 6.7 44 | 20.0 68 | 50-100 164-328 | 0.8 0.5 | 7.8 46 | |||||||||||||||
04 | 7.2 45 | 753.3 29.66 1004.32 1004.32 | 771.4 30.37 1028.45 1028.45 | 0.2 0.01 0.27 0.27 | 93 | Calm, no wind | Calm | 20–30%. 2/10–3/10. 2 oktas | 50-100 164-328 | 16.0 9.9 | 6.1 43 | ||||||||||||||||||
01 | 8.3 47 | 753.1 29.65 1004.05 1004.05 | 771.2 30.36 1028.18 1028.18 | 0.0 0 0 0 | 90 | Calm, no wind | Calm | no clouds no clouds no clouds | 6.1 43 | 14.4 58 | 16.0 9.9 | 6.7 44 | |||||||||||||||||
| October 19, Monday | 22 | 11.1 52 | 753.1 29.65 1004.05 1004.05 | 771.3 30.37 1028.32 1028.32 | 0.3 0.01 0.4 0.4 | 77 | Calm, no wind | Calm | 20–30%. 2/10–3/10. 2 oktas | 2500 or more, or no clouds. 8202 or more, or no clouds. | 16.0 9.9 | 7.2 45 | |||||||||||||||||
19 | 14.4 58 | 752.8 29.64 1003.65 1003.65 | 771.1 30.36 1028.05 1028.05 | 0.3 0.01 0.4 0.4 | 58 | Wind blowing from the east | Light breeze (3 m/s) (11 km/h) (7 miles/hour) (6 knots) (2 Bft) | 70 – 80%. 7/10 – 8/10. 6 oktas | 6.1 43 | 20.0 68 | 2500 or more, or no clouds. 8202 or more, or no clouds. | 16.0 9.9 | 6.1 43 | ||||||||||||||||