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
98.0
95
98
100
100
98
February
92.2
94
97
100
77
100
March
87.6
83
96
84
85
89
April
88.6
96
79
90
92
May
90.8
89
97
92
84
June
90.0
91
95
84
91
July
89.6
89
93
93
93
August
84.3
87
81
80
87
September
93.0
93
92
98
96
October
97.8
98
95
100
100
November
97.3
95
100
98
99
December
97.5
99
97
99
98
Average
91.7
90.2
93.6
92.3
91.3
93.3
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.