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
43.2
47
32
51
February
59.9
46
62
73
March
82.2
78
74
95
April
82.3
81
84
May
95.1
99
92
June
94.5
95
94
July
91.2
92
91
August
95.1
91
99
September
83.8
91
77
October
61.0
66
55
November
45.8
55
37
December
31.5
24
45
Average
70.8
58.0
75.8
78.7
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.