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
92.3
92
92
80
96
0
February
89.7
81
86
93
93
March
93.3
96
88
90
98
0
April
97.1
96
91
100
May
97.9
98
99
95
June
97.3
97
95
98
July
93.5
90
89
93
92
August
91.9
93
87
95
90
September
96.9
99
94
96
99
October
94.3
95
83
97
98
November
95.8
95
90
98
97
December
96.3
92
97
98
100
Average
94.3
89.7
93.5
90.5
96.2
96.0
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.