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
97.2
94
98
100
February
97.1
97
98
97
March
95.6
90
98
98
April
97.7
98
98
May
98.5
98
99
June
96.7
95
99
July
94.0
97
91
August
92.1
88
97
September
93.7
99
89
October
97.2
99
95
November
98.5
98
99
December
96.7
96
99
Average
95.5
93.6
96.6
96.4
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.