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
98.6
98
100
99
February
97.3
100
94
98
March
90.3
95
96
80
April
96.1
100
96
92
May
97.8
97
99
June
97.2
97
98
July
97.1
95
99
August
99.4
99
100
September
96.4
95
98
October
94.8
95
94
November
98.5
100
97
December
94.9
99
88
Average
96.8
98.0
96.7
95.6
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.