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
96.7
98
96
99
96
96
February
95.7
95
91
98
98
98
March
94.1
96
94
89
97
99
April
91.9
85
87
96
99
May
86.4
88
77
94
92
June
85.7
83
76
87
91
July
93.5
92
98
98
98
August
92.2
91
88
94
90
September
91.5
92
84
97
97
October
89.8
89
82
89
98
November
94.7
92
97
96
98
December
95.9
93
99
100
96
Average
93.0
96.3
90.6
89.5
95.2
96.1
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.