Helsinki Vantaa Airport

EFHK · Uusimaa, Finland

Climate Helsinki Vantaa Airport 2021-2025

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

Calculated from historical METAR data of Helsinki Vantaa Airport (EFHK) between 2021 and 2025.

VFR conditions (%)

Month Average 2025 2024 2023 2022 2021
January 31.5 27 39 30 35 19
February 45.2 40 42 38 49
March 59.7 42 57 83 54
April 75.5 51 91 82 72
May 88.1 99 94 86 78
June 92.2 94 98 92 95
July 88.5 84 90 90 95
August 81.3 87 69 88 69
September 71.6 69 68 84 76
October 52.4 65 57 51 38
November 31.7 33 30 14 39
December 28.2 32 30 31 44
Average 65.4 26.5 68.4 71.3 73.9 67.8

VFR conditions during daylight period

Percentage of observations where the VFR minimums for ceiling and visibility are met: visibility of 8 km 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 2025 2024 2023 2022 2021
January 51.1 44 63 49 51 41
February 64.9 57 68 60 66
March 75.5 60 78 95 68
April 86.8 81 97 90 84
May 94.1 99 97 93 89
June 96.0 99 100 93 97
July 96.3 94 99 97 98
August 91.9 94 82 97 88
September 87.4 82 86 96 92
October 76.3 85 86 71 70
November 62.7 55 66 57 77
December 57.9 55 59 67 66
Average 79.3 43.9 82.5 85.7 86.2 82.7

Marginal VFR conditions or better during daylight period

Percentage of observations where the MVFR minimums for ceiling and visibility are met: visibility of 5 km 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 2025 2024 2023 2022 2021
January -1.2 1.3 -6.7 0.1 -1.3 -3.6
February -1.1 -2.5 0.0 0.3 -5.4
March 2.6 3.5 1.3 4.5 2.2
April 8.7 7.2 10.8 7.5 8.5
May 15.9 19.6 16.1 14.3 14.6
June 21.4 21.8 22.0 21.6 24.3
July 22.3 22.6 21.0 22.5 26.0
August 21.1 22.1 20.8 23.8 19.1
September 15.7 18.5 18.3 13.5 12.8
October 9.3 11.3 7.2 10.5 10.3
November 4.0 4.5 1.3 3.6 3.6
December 0.1 2.1 -3.0 -3.7 -5.9
Average 9.0 1.2 10.5 9.7 10.3 9.3

Average highest temperature per day

The maximum temperature is typically observed some hours after noon.

Minimum temperatures (°C)

Month Average 2025 2024 2023 2022 2021
January -7.9 -4.3 -13.0 -4.5 -7.0 -8.5
February -7.1 -7.7 -7.9 -6.5 -13.5
March -5.3 -3.5 -6.0 -6.7 -5.2
April -1.3 0.0 -1.5 -2.3 0.3
May 4.3 6.0 3.2 3.7 5.2
June 10.1 10.6 8.0 10.8 11.6
July 12.3 14.1 11.0 12.3 14.0
August 11.7 12.0 12.8 12.9 11.5
September 7.6 9.3 10.3 4.5 5.7
October 3.4 4.0 1.6 3.7 5.5
November -1.8 0.3 -3.0 0.2 -2.7
December -5.8 -3.0 -8.5 -8.2 -10.3
Average 1.6 -4.3 2.6 1.7 2.1 1.6

Average lowest temperature per day

The minimum temperature is typically observed just before sunrise.

Precipitation (%)

Month Average 2025 2024 2023 2022 2021
January 41.4 43 47 36 46 53
February 32.9 37 34 39 29
March 21.4 19 26 10 29
April 14.6 27 2 16 15
May 8.9 1 7 15 14
June 6.6 6 3 7 3
July 8.7 11 11 8 4
August 10.9 10 21 2 15
September 11.9 12 9 11 9
October 22.3 12 25 20 23
November 31.1 34 42 38 25
December 39.0 44 51 46 26
Average 19.6 42.5 17.0 17.4 16.1 16.7

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 2025 2024 2023 2022 2021
January 9.1 8 10 9 11 8
February 9.3 9 9 10 7
March 9.4 7 9 8 10
April 9.1 9 9 9 10
May 8.6 8 9 10 9
June 8.6 9 7 9 8
July 8.1 9 8 8 8
August 8.5 8 8 9 10
September 8.6 7 9 7 9
October 9.1 9 10 9 11
November 8.7 9 7 9 9
December 8.6 8 7 6 8
Average 8.7 8.0 8.3 8.4 8.7 8.9

Average wind speed

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

Prevailing wind direction

Month 2025 2024 2023 2022 2021
January 214° 228° 188° 277° 056°
February 132° 269° 198° 342°
March 146° 245° 260° 244°
April 313° 060° 278° 231°
May 205° 227° 237° 154°
June 206° 263° 213° 205°
July 194° 218° 228° 210°
August 213° 140° 161° 184°
September 169° 209° 020° 338°
October 216° 303° 222° 198°
November 240° 038° 064° 266°
December 234° 029° 076° 298°

Prevailing wind direction

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