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
97.6
99
98
98
98
93
February
97.1
97
96
100
91
100
March
93.7
90
100
77
100
94
April
93.2
99
87
98
97
May
95.8
93
95
98
91
June
96.4
98
96
89
99
July
99.7
100
99
100
100
August
98.7
100
96
99
98
September
97.6
95
95
98
99
October
98.3
92
100
100
98
November
98.4
97
100
96
100
December
99.6
100
100
100
99
Average
96.9
94.9
97.2
94.6
97.2
97.2
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.