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
84.1
91
78
84
February
95.9
94
96
98
March
94.2
97
94
92
April
97.4
99
97
96
May
95.8
94
98
June
98.6
98
99
July
98.7
98
99
August
96.6
97
96
September
96.4
97
96
October
85.1
93
77
November
77.9
90
67
December
66.7
73
57
Average
93.2
95.5
93.2
91.0
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.