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
85.8
91
75
94
February
95.6
97
98
93
March
94.3
96
89
99
April
93.3
98
94
89
May
89.9
81
99
June
96.4
95
98
July
99.4
99
100
August
97.5
98
98
September
95.0
98
93
October
83.2
99
71
November
67.7
93
49
December
67.6
81
51
Average
91.7
95.4
91.7
88.0
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.