Valleyfield Airport

CSD3 · Quebec, Canada

Climate Valleyfield Airport 2021-2025

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

Calculated from historical METAR data of Montreal / Pierre Elliott Trudeau International Airport (CYUL) between 2021 and 2025.

VFR conditions (%)

Month Average 2025 2024 2023 2022 2021
January 60.4 56 51 38 67 65
February 74.9 66 78 73 73 78
March 77.6 73 71 74 74 93
April 79.8 73 82 85 88
May 87.6 75 85 92 91 94
June 86.3 86 81 73 90 95
July 90.1 85 81 95 89
August 89.2 76 84 90 93
September 87.7 88 86 76 95
October 82.7 91 78 95 78
November 79.4 74 81 76 85
December 66.6 62 44 68 75
Average 80.8 72.5 77.0 75.2 83.0 86.8

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 2025 2024 2023 2022 2021
January 80.0 78 75 67 78 89
February 84.7 75 91 85 83 88
March 88.9 85 87 87 85 98
April 92.1 91 91 94 97
May 96.4 92 95 98 97 98
June 96.8 97 95 89 99 99
July 97.1 94 93 98 100
August 96.0 85 96 97 98
September 96.3 96 96 92 100
October 93.0 97 91 98 91
November 91.7 97 93 89 96
December 84.8 85 69 81 94
Average 91.8 86.6 90.6 88.8 91.9 96.1

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 2025 2024 2023 2022 2021
January -4.3 -5.5 -3.6 -2.8 -8.2 -4.7
February -2.4 -5.4 2.2 -2.5 -3.6 -4.6
March 3.8 6.2 6.2 3.5 3.2 5.9
April 11.6 12.5 13.8 11.1 14.4
May 20.0 19.5 21.6 20.6 22.0 20.1
June 24.9 25.6 25.6 24.6 23.8 26.8
July 27.5 27.8 26.8 27.1 25.1
August 25.8 25.5 24.1 26.3 28.1
September 21.9 23.3 23.1 20.3 21.8
October 15.1 16.0 16.3 16.0 15.9
November 6.1 8.8 5.7 8.4 6.0
December -1.7 -2.6 2.1 2.5 1.3
Average 12.3 8.6 13.8 13.2 13.0 13.3

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 -11.5 -11.0 -8.2 -7.4 -18.5 -9.3
February -10.3 -12.3 -6.0 -11.9 -12.6 -11.0
March -5.8 -4.0 -2.7 -4.6 -5.5 -4.1
April 2.5 3.3 3.2 2.2 4.0
May 9.7 10.1 12.4 8.5 11.0 9.6
June 15.3 15.9 16.8 15.0 15.0 17.1
July 18.5 19.3 19.1 18.1 17.0
August 17.3 17.1 16.1 17.8 19.5
September 13.1 14.0 14.4 12.1 13.9
October 7.2 7.4 9.8 6.0 8.5
November -1.4 2.2 -1.1 1.5 -1.7
December -7.4 -8.7 -3.1 -4.7 -7.5
Average 4.0 5.9 5.2 4.3 5.0

Average lowest temperature per day

The minimum temperature is typically observed just before sunrise.

Precipitation (%)

Month Average 2025 2024 2023 2022 2021
January 40.3 48 40 47 40 33
February 31.7 44 19 34 37 31
March 23.8 29 24 28 32 10
April 22.8 29 19 21 19
May 12.8 24 12 11 11 6
June 11.2 8 17 13 15 9
July 7.3 11 12 5 5
August 9.7 20 12 10 6
September 8.6 6 7 17 7
October 15.1 7 21 8 19
November 20.4 16 15 26 15
December 29.5 24 37 31 22
Average 19.0 28.5 18.3 20.0 19.7 13.9

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 2025 2024 2023 2022 2021
January 9.6 11 10 9 9 8
February 10.5 11 9 10 12 9
March 10.8 11 11 11 11 11
April 10.9 11 11 11 10
May 9.2 8 9 10 9 9
June 9.2 9 9 8 10 10
July 8.5 9 8 10 8
August 8.2 8 8 8 9
September 8.0 8 8 8 8
October 9.0 9 8 8 8
November 9.7 10 10 9 9
December 9.4 9 8 11 10
Average 9.4 9.7 9.2 8.9 9.5 9.1

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 270° 300° 326° 336° 275°
February 286° 241° 292° 263° 258°
March 265° 293° 277° 271° 252°
April 098° 238° 294° 328°
May 050° 187° 261° 189° 254°
June 239° 242° 041° 229° 221°
July 248° 223° 237° 242°
August 222° 234° 255° 223°
September 217° 248° 293° 230°
October 261° 224° 196° 033°
November 291° 240° 229° 253°
December 299° 001° 330° 273°

Prevailing wind direction

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