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 December 7, Sunday | 12 | -3.3 26 | 748.0 29.45 997.25 997.25 | 766.6 30.18 1022.05 1022.05 | 1.9 0.07 2.53 2.53 | 78 | Wind blowing from the north | Moderate breeze (7 m/s) (25 km/h) (16 miles/hour) (14 knots) (4 Bft) | 100%. 10/10. 8 oktas | -3.9 25 | -1.1 30 | 300-600 984-1968 | 12.0 7.5 | -6.7 20 | 1.0 0.04 | 6 | |||||||||||||
09 | -3.9 25 | 746.1 29.37 994.72 994.72 | 764.7 30.11 1019.52 1019.52 | 2.3 0.09 3.07 3.07 | 88 | Wind blowing from the north | Moderate breeze (7 m/s) (25 km/h) (16 miles/hour) (14 knots) (4 Bft) | 70 – 80%. 7/10 – 8/10. 6 oktas | 200-300 656-984 | 11.0 6.8 | -5.6 22 | 1.0 0.04 | 3 | ||||||||||||||||
06 | -1.7 29 | 743.8 29.28 991.65 991.65 | 762.3 30.01 1016.32 1016.32 | 0.2 0.01 0.27 0.27 | 96 | Wind blowing from the north | Gentle breeze (4 m/s) (14 km/h) (9 miles/hour) (8 knots) (3 Bft) | 100%. 10/10. 8 oktas | Continuous fall of snowflakes, slight at time of observation. | -1.7 29 | 0.0 32 | 300-600 984-1968 | 2.0 1.2 | -2.2 28 | 8.0 0.31 | 6 | |||||||||||||
03 | -1.7 29 | 743.6 29.28 991.39 991.39 | 761.9 30 1015.78 1015.78 | 0.3 0.01 0.4 0.4 | 96 | Wind blowing from the north-east | Light breeze (2 m/s) (7 km/h) (4 mph) (4 knots) (2 Bft) | Continuous fall of snowflakes, slight at time of observation. | 200-300 656-984 | 1.2 0.8 | -2.2 28 | 3.0 0.12 | 3 | ||||||||||||||||
00 | -1.1 30 | 743.3 29.26 990.99 990.99 | 761.8 29.99 1015.65 1015.65 | 0.0 0 0 0 | 92 | Calm, no wind | Calm | 100%. 10/10. 8 oktas | Continuous fall of snowflakes, slight at time of observation. | 0.0 32 | 300-600 984-1968 | 2.4 1.5 | -2.2 28 | 0.3 0.01 | 6 | ||||||||||||||
| December 6, Saturday | 21 | -0.6 31 | 743.3 29.26 990.99 990.99 | 761.8 29.99 1015.65 1015.65 | 0.7 0.03 0.93 0.93 | 76 | Wind blowing from the west-northwest | Light breeze (2 m/s) (7 km/h) (4 mph) (4 knots) (2 Bft) | 100%. 10/10. 8 oktas | 600-1000 1968-3281 | 16.0 9.9 | -4.4 24 | |||||||||||||||||
18 | 0.0 32 | 742.6 29.24 990.05 990.05 | 760.9 29.96 1014.45 1014.45 | 0.3 0.01 0.4 0.4 | 69 | Wind blowing from the south-west | Light breeze (2 m/s) (7 km/h) (4 mph) (4 knots) (2 Bft) | 100%. 10/10. 8 oktas | -3.3 26 | 0.0 32 | 600-1000 1968-3281 | 16.0 9.9 | -5.0 23 | ||||||||||||||||
15 | 0.0 32 | 742.3 29.22 989.65 989.65 | 760.9 29.96 1014.45 1014.45 | -0.3 -0.01 -0.4 -0.4 | 66 | Wind blowing from the south-southeast | Light breeze (2 m/s) (7 km/h) (4 mph) (4 knots) (2 Bft) | 100%. 10/10. 8 oktas | 600-1000 1968-3281 | 16.0 9.9 | -5.6 22 | ||||||||||||||||||
12 | -0.6 31 | 742.6 29.24 990.05 990.05 | 761.0 29.96 1014.58 1014.58 | 0.5 0.02 0.67 0.67 | 67 | Calm, no wind | Calm | 100%. 10/10. 8 oktas | -3.3 26 | -0.6 31 | 600-1000 1968-3281 | 16.0 9.9 | -6.1 21 | ||||||||||||||||