Des Moines International Airport

KDSM · Iowa, United States

Climate Des Moines International Airport 2020-2024

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

Calculated from historical METAR data of Des Moines International Airport (KDSM) between 2020 and 2024.

VFR conditions (%)

Month Average 2024 2023 2022 2021 2020
January 58.9 44 46 84 61 43
February 76.5 86 74 83 72 85
March 71.0 80 62 72 76 62
April 79.1 85 75 81 83
May 76.5 84 77 73 69
June 93.1 91 96 96 92
July 94.1 90 93 93 96
August 93.5 91 91 98 99
September 86.5 86 89 94 82
October 78.9 80 95 77 85
November 80.1 95 70 88 83
December 68.0 50 51 83 72
Average 79.3 70.0 78.8 82.8 83.1 79.9

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 77.6 64 75 91 86 67
February 88.3 93 90 95 84 96
March 86.4 95 85 89 90 79
April 91.7 95 89 97 91
May 90.8 92 90 91 91
June 97.1 95 98 99 96
July 97.5 93 97 98 98
August 97.9 98 97 100 100
September 93.4 90 95 98 89
October 92.2 98 99 94 93
November 92.2 99 90 96 89
December 85.4 82 65 90 83
Average 90.5 84.1 91.2 92.4 94.0 89.7

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 -1.8 -2 1 -1 1 0
February 3.5 12 6 3 -5 4
March 10.5 14 9 10 13 12
April 16.7 18 15 17 16
May 23.0 25 23 21 20
June 29.2 29 29 30 29
July 30.4 30 31 30 31
August 29.1 30 30 30 30
September 26.3 28 26 28 24
October 17.1 18 18 19 15
November 9.7 12 10 12 13
December 4.8 7 3 8 4
Average 15.6 7.8 17.8 16.8 17.1 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 -9.9 -8 -6 -13 -6 -7
February -7.1 -1 -5 -10 -12 -6
March 0.2 2 -1 -1 3 2
April 5.0 5 3 6 5
May 12.5 13 13 12 12
June 18.4 18 18 19 19
July 20.1 19 20 20 21
August 18.7 20 19 20 18
September 15.3 15 15 16 13
October 7.0 9 6 10 5
November -1.7 1 0 1 2
December -4.0 0 -5 -3 -6
Average 5.4 -3.4 7.3 5.8 7.1 6.4

Average lowest temperature per day

The minimum temperature is typically observed just before sunrise.

Precipitation (%)

Month Average 2024 2023 2022 2021 2020
January 15.4 20 10 9 12 22
February 13.2 2 14 13 18 7
March 13.8 9 19 12 9 14
April 10.6 10 17 4 9
May 8.3 4 9 11 13
June 3.3 2 2 3 5
July 2.5 3 4 2 3
August 3.1 5 3 1 1
September 6.4 3 6 2 12
October 7.9 6 4 8 6
November 9.0 3 16 5 9
December 12.8 14 19 7 9
Average 8.8 10.3 7.3 8.7 6.5 8.7

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 10 9 10
February 10.1 10 11 11 9 10
March 10.7 11 11 11 11 10
April 11.4 13 13 11 11
May 9.0 9 10 9 8
June 8.5 8 9 8 10
July 7.5 7 8 7 7
August 7.6 8 7 8 8
September 8.4 8 8 8 9
October 9.7 10 9 9 10
November 10.3 9 12 11 11
December 9.4 9 10 10 9
Average 9.4 9.9 9.2 9.8 9.0 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 291° 291° 286° 323° 282°
February 261° 277° 303° 319° 309°
March 324° 309° 316° 170° 252°
April 262° 247° 262° 285°
May 117° 178° 175° 004°
June 116° 198° 199° 173°
July 289° 233° 192° 174°
August 200° 228° 167° 186°
September 172° 204° 195° 211°
October 287° 258° 322° 289°
November 239° 263° 256° 231°
December 263° 202° 232° 281°

Prevailing wind direction

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