Climate data for Chicago Midway Airport
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high deg F (deg C) 67
(19.4)		 75
(23.9)		 88
(31.1)		 91
(32.8)		 98
(36.7)		 104
(40)		 105
(40.6)		 102
(38.9)		 101
(38.3)		 94
(34.4)		 81
(27.2)		 71
(21.7)		 105
(40.6)
Average high deg F (deg C) 30.7
(-0.72)		 36.1
(2.28)		 47.4
(8.56)		 59.2
(15.11)		 71.3
(21.83)		 80.8
(27.11)		 84.7
(29.28)		 82.3
(27.94)		 75.1
(23.94)		 63.2
(17.33)		 48.0
(8.89)		 35.6
(2)		 59.5
(15.28)
Average low deg F (deg C) 16.2
(-8.78)		 21.3
(-5.94)		 30.6
(-0.78)		 40.2
(4.56)		 50.9
(10.5)		 60.7
(15.94)		 66.3
(19.06)		 65.0
(18.33)		 56.7
(13.72)		 44.9
(7.17)		 33.6
(0.89)		 22.2
(-5.44)		 42.4
(5.78)
Record low deg F (deg C) -27
(-32.8)		 -21
(-29.4)		 -12
(-24.4)		 7
(-13.9)		 27
(-2.8)		 35
(1.7)		 45
(7.2)		 43
(6.1)		 29
(-1.7)		 14
(-10)		 -2
(-18.9)		 -25
(-31.7)		 -27
(-32.8)
Precipitation inches (mm) 1.95
(49.5)		 1.78
(45.2)		 2.83
(71.9)		 3.82
(97)		 3.86
(98)		 4.16
(105.7)		 3.82
(97)		 3.91
(99.3)		 3.45
(87.6)		 2.79
(70.9)		 3.22
(81.8)		 2.76
(70.1)		 38.35
(974.1)
Snowfall inches (cm) 12.9
(32.8)		 10.3
(26.2)		 6.0
(15.2)		 1.4
(3.6)		 0
(0)		 0
(0)		 0
(0)		 0
(0)		 0
(0)		 0.1
(0.3)		 2.3
(5.8)		 10.1
(25.7)		 43.1
(109.5)
Avg. precipitation days (greater than or equal to 0.01 in) 11.2 8.9 11.7 11.6 11.0 10.3 9.5 9.6 8.9 9.7 11.5 11.3 125.2
Avg. snowy days (greater than or equal to 0.1 in) 6.2 6.2 4.5 1.0 0 0 0 0 0 0.2 2.7 7.2 28
Sunshine hours 136.4 138.4 186.0 216.0 282.1 312.0 319.3 282.1 228.0 192.2 114.0 105.4 2,511.9
Source: NOAA, Illinois State Climatologist Office