St. John's International Airport

CYYT · Newfoundland and Labrador, Canada

Climate St. John's International Airport 2020-2024

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

Calculated from historical METAR data of St. John's International Airport (CYYT) between 2020 and 2024.

VFR conditions (%)

Month Average 2024 2023 2022 2021 2020
January 35.5 31 29 39 20 42
February 42.8 38 48 39 49
March 42.8 26 48 54 50
April 42.0 34 28 33 62
May 53.7 48 67 61 60
June 51.8 25 55 64 52
July 55.7 46 66 50 45
August 55.0 42 45 59 66
September 55.4 44 40 53 70
October 51.0 37 66 35 51
November 45.9 30 41 53 50
December 33.9 38 10 39 36
Average 46.5 30.8 36.9 48.5 48.4 53.8

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 70.6 72 70 65 51 80
February 73.5 64 81 70 76
March 66.9 47 74 78 63
April 62.1 57 46 50 75
May 70.9 66 76 79 80
June 62.3 35 66 75 65
July 69.5 63 83 66 59
August 74.7 67 64 80 81
September 73.3 63 61 77 84
October 72.8 58 72 68 74
November 72.2 75 70 72 76
December 66.7 70 26 72 64
Average 69.9 71.9 59.7 67.0 70.4 72.6

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 0.3 -1 2 2 0 -2
February -1.3 -3 2 0 -1
March 1.2 -1 2 3 0
April 5.3 4 5 6 4
May 9.8 10 11 11 11
June 15.8 14 17 18 18
July 20.8 24 23 20 18
August 21.0 19 22 21 22
September 17.2 18 18 19 19
October 11.6 12 15 10 12
November 6.5 5 7 8 7
December 2.3 3 3 2 5
Average 8.0 -2.6 8.9 10.8 9.9 9.5

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 -6.4 -7 -4 -6 -3 -7
February -8.6 -10 -6 -5 -8
March -5.4 -4 -5 -4 -6
April -2.9 -2 -1 1 -2
May 1.5 2 2 3 2
June 7.1 6 9 8 10
July 12.4 16 14 11 11
August 13.4 13 15 13 13
September 10.0 11 12 10 11
October 5.4 6 7 6 6
November 0.4 -1 0 2 0
December -3.3 -2 0 -4 0
Average 1.4 -7.3 2.7 3.6 3.2 2.5

Average lowest temperature per day

The minimum temperature is typically observed just before sunrise.

Precipitation (%)

Month Average 2024 2023 2022 2021 2020
January 38.5 47 37 44 43 33
February 40.9 53 41 40 39
March 32.2 46 36 25 36
April 28.0 33 32 36 18
May 18.9 27 18 10 13
June 20.3 30 22 14 20
July 14.9 15 8 20 21
August 14.3 26 16 6 11
September 19.5 21 31 11 12
October 20.9 33 9 30 23
November 28.1 33 32 25 21
December 38.0 34 52 39 34
Average 27.1 46.9 31.0 26.0 22.7 21.9

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 15.3 16 15 17 14 13
February 17.5 17 17 18 19
March 16.3 16 17 17 17
April 15.0 15 14 14 15
May 14.0 15 11 15 16
June 12.2 10 12 13 12
July 11.8 11 13 12 11
August 11.5 10 11 13 12
September 12.6 11 14 12 14
October 12.7 12 12 14 13
November 15.3 12 16 14 15
December 15.3 15 14 17 14
Average 14.2 16.4 13.1 13.8 14.2 14.0

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 288° 264° 235° 340° 303°
February 310° 271° 295° 279°
March 353° 262° 270° 297°
April 336° 291° 114° 271°
May 270° 282° 275° 263°
June 355° 261° 261° 244°
July 242° 250° 251° 256°
August 221° 261° 277° 260°
September 268° 278° 253° 253°
October 268° 270° 338° 255°
November 291° 280° 230° 269°
December 274° 082° 279° 255°

Prevailing wind direction

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