St-Michel-de-Napierville Airport

CMN3 · Quebec, Canada

Climate St-Michel-de-Napierville Airport 2020-2024

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 2020 and 2024.

VFR conditions (%)

Month Average 2024 2023 2022 2021 2020
January 61.0 51 38 67 65 70
February 76.1 78 73 73 78 78
March 78.1 71 74 74 93 80
April 79.8 73 82 85 88 89
May 90.0 92 91 94 95
June 87.3 73 90 95 91
July 90.9 81 95 89 93
August 91.2 84 90 93 90
September 87.7 86 76 95 91
October 81.5 78 95 78 85
November 80.1 81 76 85 87
December 67.4 44 68 75 70
Average 80.8 68.7 75.2 83.0 86.8 85.8

38th best VFR conditions of Canada

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 80.2 75 67 78 89 89
February 86.0 91 85 83 88 84
March 89.5 87 87 85 98 91
April 92.1 91 91 94 97 98
May 97.3 98 97 98 99
June 97.0 89 99 99 97
July 97.5 93 98 100 98
August 97.7 96 97 98 97
September 96.4 96 92 100 98
October 92.4 91 98 91 93
November 91.0 93 89 96 94
December 84.8 69 81 94 90
Average 91.9 86.1 88.8 91.9 96.1 94.4

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 -4.4 -2 -1 -8 -3 -2
February -2.8 2 -2 -2 -3 -1
March 3.4 6 4 3 6 5
April 11.6 13 14 11 14 10
May 19.9 21 22 20 19
June 24.6 25 24 27 25
July 27.4 27 27 25 29
August 25.9 24 26 28 25
September 21.7 23 20 22 20
October 15.0 16 16 16 13
November 5.7 6 8 6 9
December -1.8 2 3 1 1
Average 11.6 4.6 13.2 13.0 13.3 12.9

88th highest temperature of Canada

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 -11.6 -8 -7 -18 -9 -8
February -10.5 -6 -10 -11 -11 -9
March -5.8 -1 -3 -5 -4 -3
April 2.5 3 3 2 4 1
May 9.3 9 11 10 9
June 15.0 15 15 17 15
July 18.4 19 18 17 20
August 17.4 16 18 20 17
September 13.0 14 12 14 11
October 7.1 10 6 9 6
November -1.0 -1 2 0 1
December -7.5 -3 -3 -7 -5
Average 3.4 -3.1 5.2 4.3 5.0 4.6

Average lowest temperature per day

The minimum temperature is typically observed just before sunrise.

Precipitation (%)

Month Average 2024 2023 2022 2021 2020
January 39.3 40 47 40 33 33
February 30.1 19 34 37 31 34
March 23.0 24 28 32 10 20
April 22.8 29 19 21 19 17
May 11.2 11 11 6 5
June 10.9 13 15 9 4
July 6.7 12 5 5 6
August 8.1 12 10 6 12
September 9.0 7 17 7 9
October 16.4 21 8 19 19
November 21.1 15 26 15 13
December 30.4 37 31 22 29
Average 19.0 27.9 20.0 19.7 13.9 15.3

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 9.5 10 9 9 8 9
February 10.5 9 10 12 9 11
March 10.8 11 11 11 11 11
April 10.9 11 11 11 10 12
May 9.5 10 9 9 10
June 9.3 8 10 10 10
July 8.5 8 10 8 9
August 8.2 8 8 9 8
September 7.9 8 8 8 9
October 9.0 8 8 8 9
November 9.6 10 9 9 10
December 9.4 8 11 10 10
Average 9.5 10.3 8.9 9.5 9.1 9.6

88th highest wind speed of Canada

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 300° 326° 336° 275° 287°
February 241° 292° 263° 258° 257°
March 293° 277° 271° 252° 257°
April 098° 238° 294° 328° 298°
May 261° 189° 254° 261°
June 041° 229° 221° 231°
July 223° 237° 242° 224°
August 234° 255° 223° 244°
September 248° 293° 230° 223°
October 224° 196° 033° 228°
November 240° 229° 253° 240°
December 001° 330° 273° 246°

Prevailing wind direction

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