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
2020
January
86.7
91
83
22
89
February
67.7
73
52
72
68
77
March
77.7
85
91
44
73
74
April
88.4
70
100
100
100
May
99.5
100
99
June
99.4
99
100
100
100
July
98.4
99
100
78
August
95.0
96
100
90
September
96.8
96
100
98
100
October
94.7
89
100
100
97
November
98.0
96
100
100
99
December
85.5
79
100
93
90
Average
89.3
83.3
88.6
81.5
88.2
94.1
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.