Chicago Midway International Airport

KMDW · Illinois, United States

Climate Chicago Midway International Airport 2020-2024

Climate and trends: average temperature, flight conditions, precipitation, wind speed and direction.

Calculated from historical METAR data of Chicago Midway International Airport (KMDW) between 2020 and 2024.

VFR conditions (%)

Month Average 2024 2023 2022 2021 2020
January 47.3 35 26 69 46 43
February 70.0 86 72 70 72 73
March 73.2 73 65 73 85 60
April 79.7 82 81 84 76
May 82.6 91 77 88 83
June 87.1 79 94 89 96
July 90.6 84 86 83 95
August 91.4 87 89 97 97
September 84.7 78 82 92 78
October 74.4 73 85 67 79
November 72.5 78 75 85 78
December 62.5 47 40 67 69
Average 76.3 65.0 73.3 78.8 80.9 78.7

VFR conditions during daylight period

Percentage of observations where the VFR minimums for ceiling and visibility are met: visibility of 5 mi or more and a ceiling of 3,000 ft or more. Only observations between sunrise and sunset are taken into account.

Marginal VFR conditions (%)

Month Average 2024 2023 2022 2021 2020
January 79.3 65 76 91 82 77
February 87.3 97 90 86 83 91
March 91.4 91 93 91 96 86
April 92.2 97 94 94 91
May 93.2 97 89 97 91
June 94.4 87 99 98 100
July 97.8 94 96 98 99
August 98.8 97 98 100 99
September 96.0 94 97 100 92
October 90.8 94 92 89 94
November 92.9 94 94 98 93
December 87.8 78 74 91 95
Average 91.5 84.6 91.5 92.8 94.4 92.6

Marginal VFR conditions or better during daylight period

Percentage of observations where the MVFR minimums for ceiling and visibility are met: visibility of 3⅛ mi or more and a ceiling of 1,000 ft or more. Only observations between sunrise and sunset are taken into account.

Maximum temperatures (°C)

Month Average 2024 2023 2022 2021 2020
January 1.1 0 3 -1 2 3
February 4.3 10 6 3 -2 3
March 9.5 13 8 11 13 10
April 15.4 18 14 17 15
May 22.0 23 24 21 21
June 27.9 27 30 29 29
July 29.3 29 30 28 31
August 28.5 28 29 30 29
September 25.5 25 26 27 24
October 17.8 18 19 20 16
November 9.4 11 12 9 14
December 5.4 8 4 8 5
Average 15.3 7.7 17.0 17.1 16.8 16.5

Average highest temperature per day

The maximum temperature is typically observed some hours after noon.

Minimum temperatures (°C)

Month Average 2024 2023 2022 2021 2020
January -5.1 -4 -2 -9 -3 -3
February -4.0 1 -3 -6 -9 -5
March 1.2 3 1 2 3 2
April 5.7 6 6 7 5
May 12.2 12 15 12 11
June 18.2 17 19 20 19
July 21.0 20 22 21 22
August 20.1 20 21 22 20
September 16.8 17 17 17 15
October 9.4 10 9 13 7
November 1.9 3 3 1 5
December -2.8 3 -2 1 -2
Average 7.0 -1.8 8.7 8.5 8.7 8.0

Average lowest temperature per day

The minimum temperature is typically observed just before sunrise.

Precipitation (%)

Month Average 2024 2023 2022 2021 2020
January 22.7 27 29 16 23 20
February 15.5 2 13 22 23 18
March 12.7 9 20 25 6 11
April 12.2 9 15 8 14
May 8.7 7 14 9 9
June 5.2 4 4 8 3
July 3.7 7 5 4 3
August 3.0 5 5 1 1
September 5.5 10 4 2 8
October 11.0 15 7 11 9
November 11.2 10 17 8 9
December 13.8 22 24 7 10
Average 10.2 12.6 11.7 12.2 8.6 9.0

Precipitation during daylight period

Percentage of observations with observed rain, drizzle, snow or hail. Only observations between sunrise and sunset are taken into account.

Wind speed (knots)

Month Average 2024 2023 2022 2021 2020
January 9.6 9 9 11 9 9
February 10.3 9 11 11 9 11
March 10.9 11 11 11 11 10
April 10.6 11 12 10 10
May 9.5 8 11 10 9
June 9.0 9 9 9 9
July 8.2 8 9 8 8
August 8.2 9 9 8 8
September 8.6 8 8 9 10
October 9.6 10 10 9 10
November 9.9 9 11 10 11
December 9.5 9 10 10 9
Average 9.5 10.1 9.1 9.9 9.3 9.4

Average wind speed

Excluding wind gusts. Only observations between sunrise and sunset are taken into account.

Prevailing wind direction

Month 2024 2023 2022 2021 2020
January 271° 264° 282° 279° 245°
February 257° 254° 266° 283° 296°
March 274° 310° 264° 209° 247°
April 239° 212° 241° 299°
May 057° 149° 136° 067°
June 034° 248° 223° 178°
July 276° 267° 327° 224°
August 338° 241° 176° 193°
September 138° 295° 238° 254°
October 267° 242° 337° 267°
November 250° 233° 248° 234°
December 251° 203° 234° 254°

Prevailing wind direction

Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.