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
96.4
100
99
91
98
97
February
96.1
96
99
94
91
99
March
95.4
94
96
96
94
94
April
93.1
92
97
91
94
May
91.4
92
94
92
92
June
81.2
83
84
85
64
July
85.7
96
79
93
90
August
86.1
93
88
79
89
September
89.3
91
97
79
89
October
93.1
94
95
92
92
November
95.0
95
96
88
98
December
97.1
94
98
100
98
Average
92.5
96.6
93.9
92.4
90.3
91.8
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.