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
2021
January
49.2
38
75
35
February
62.9
61
69
59
March
71.7
77
71
68
April
65.5
68
63
May
77.4
74
81
June
0
0
July
0
0
0
August
89.2
92
92
79
September
87.9
87
89
87
October
60.9
62
58
64
November
61.7
60
63
63
December
0
0
0
Average
73.8
69.7
76.2
74.1
75.3
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.