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
99.6
100
100
100
100
99
February
94.7
95
97
98
90
100
March
84.3
85
98
80
74
83
April
77.4
88
70
80
89
May
80.4
87
87
100
81
June
89.4
92
100
100
86
July
96.8
97
99
98
98
August
88.2
84
97
98
84
September
98.9
99
100
100
98
October
94.7
100
100
89
99
November
98.3
100
100
96
100
December
99.3
97
100
100
99
Average
91.8
92.9
94.9
93.7
93.7
92.5
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.