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
2024
2023
2022
January
70.8
57
72
85
February
74.4
78
65
82
March
70.5
70
66
77
April
63.0
63
63
May
60.7
72
50
June
65.2
65
66
July
74.2
70
78
August
75.4
75
76
September
79.2
86
72
October
75.0
76
75
November
72.0
78
66
December
76.4
79
72
Average
71.8
68.0
72.4
71.9
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.