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
99.2
100
100
98
February
99.0
100
99
100
March
95.1
95
95
96
April
86.9
84
90
May
80.2
80
81
June
69.2
68
71
July
76.7
76
78
August
89.8
87
93
September
95.1
93
97
October
96.2
96
96
November
99.3
99
100
December
98.5
100
96
Average
82.9
98.1
91.4
92.3
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.