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
96.4
100
98
98
100
96
February
89.0
88
88
94
80
100
March
80.0
83
98
64
67
77
April
73.9
100
64
66
90
May
79.2
77
90
83
82
June
89.9
87
97
93
80
July
96.3
97
93
98
99
August
96.2
90
99
99
98
September
97.2
96
99
98
97
October
96.0
97
98
93
96
November
96.5
91
99
98
100
December
96.2
99
100
97
91
Average
90.4
89.6
92.0
90.2
89.1
91.5
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.