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
76.6
100
84
0
60
87
February
91.7
100
92
93
92
March
88.4
98
96
0
64
91
April
93.2
98
85
82
96
May
91.7
97
87
89
92
June
94.2
95
92
98
96
July
90.9
96
79
94
94
August
91.0
88
92
89
92
September
91.5
87
98
92
91
October
92.9
100
97
92
November
87.9
97
98
100
74
December
76.1
96
91
62
Average
89.4
99.3
93.6
91.3
84.9
89.8
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.