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
75.5
92
60
96
70
88
February
82.4
86
91
98
75
96
March
91.1
85
96
98
86
95
April
96.0
89
97
96
100
May
98.7
99
100
99
100
June
98.9
100
100
99
99
July
99.7
100
100
99
100
August
99.2
99
100
98
99
September
98.5
98
97
100
98
October
91.3
98
98
97
86
November
70.2
89
70
86
75
December
65.1
76
42
68
51
Average
90.6
87.3
92.7
94.4
91.3
92.6
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.