Harrisburg International Airport

KMDT · Pennsylvania, United States

Climate Harrisburg International Airport 2020-2024

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

Calculated from historical METAR data of Harrisburg International Airport (KMDT) between 2020 and 2024.

VFR conditions (%)

Month Average 2024 2023 2022 2021 2020
January 75.6 62 71 80 87 81
February 78.5 88 87 81 67 78
March 78.8 84 78 81 72
April 82.5 79 85 86 85
May 78.6 97 73 83 86
June 85.6 71 83 88 92
July 88.7 86 92 89 90
August 87.6 90 92 87 90
September 79.0 75 84 86 81
October 76.6 88 73 68 71
November 86.3 92 79 98 84
December 74.4 64 64 81 78
Average 80.6 74.3 82.1 81.1 83.6 83.0

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 84.2 72 82 85 93 87
February 85.9 98 90 88 81 89
March 86.8 92 83 91 83
April 92.5 86 96 95 94
May 89.7 99 87 96 96
June 93.0 83 92 96 96
July 95.3 93 96 94 98
August 96.0 98 97 98 97
September 91.7 90 92 95 93
October 89.4 93 88 90 85
November 93.5 97 87 100 98
December 81.6 73 70 88 87
Average 89.7 84.3 89.9 89.5 93.4 92.3

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 4.8 5 8 2 5 7
February 8.0 9 11 8 4 8
March 11.3 12 13 14 14
April 17.7 20 16 19 15
May 22.9 23 24 23 21
June 27.8 27 28 29 28
July 30.7 30 31 30 33
August 29.4 29 31 30 30
September 25.4 25 25 26 25
October 19.6 20 17 21 19
November 12.0 13 14 11 16
December 7.2 9 6 10 7
Average 16.7 6.7 18.8 18.2 18.5 18.6

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 -3.8 -1 1 -6 -1 -1
February -1.0 0 0 -3 -2 0
March 1.7 2 2 3 4
April 7.2 9 6 8 6
May 12.7 11 14 12 11
June 17.6 16 18 19 18
July 21.2 21 22 21 23
August 20.3 20 21 21 21
September 16.4 16 16 17 15
October 10.6 10 8 13 10
November 2.7 2 4 2 5
December -1.8 2 -1 2 -1
Average 7.8 -1.4 9.1 8.8 9.6 9.3

Average lowest temperature per day

The minimum temperature is typically observed just before sunrise.

Precipitation (%)

Month Average 2024 2023 2022 2021 2020
January 12.2 18 12 16 9 7
February 11.5 5 6 13 17 11
March 12.4 12 14 9 9
April 9.9 11 13 4 13
May 10.2 4 12 10 10
June 5.9 9 6 6 3
July 4.8 4 5 4 3
August 5.0 2 3 6 6
September 8.5 12 10 10 3
October 9.4 8 14 7 10
November 8.1 6 14 4 7
December 11.3 11 15 3 10
Average 9.2 11.9 7.9 10.6 7.2 7.3

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 7.9 8 8 7 9 8
February 7.5 7 8 9 7 7
March 8.6 9 9 9 7
April 8.3 7 9 9 9
May 6.5 6 6 7 8
June 6.2 7 7 6 6
July 5.1 5 5 5 6
August 5.2 6 6 5 6
September 5.3 6 6 6 5
October 5.9 6 5 6 6
November 6.9 6 7 7 7
December 6.5 6 7 5 8
Average 6.7 7.7 6.6 6.8 6.6 6.7

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 301° 302° 306° 310° 310°
February 302° 292° 289° 307° 292°
March 307° 293° 300° 301°
April 275° 291° 296° 310°
May 283° 133° 302° 279°
June 293° 283° 242° 289°
July 261° 240° 293° 272°
August 290° 261° 227° 257°
September 334° 292° 283° 283°
October 297° 276° 306° 302°
November 294° 281° 296° 285°
December 296° 301° 291° 296°

Prevailing wind direction

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