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
99.4
100
100
100
98
100
February
99.5
99
100
100
99
100
March
97.7
90
100
98
98
100
April
96.6
94
95
95
98
May
91.5
94
88
93
91
June
89.5
87
89
95
92
July
91.6
95
93
93
94
August
96.1
99
96
95
95
September
98.1
100
98
99
100
October
98.8
99
98
98
100
November
96.9
100
94
98
96
December
98.9
100
97
99
98
Average
96.2
96.4
97.0
95.2
96.4
96.8
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.