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
82.1
62
100
96
86
75
February
88.4
87
91
83
90
March
97.0
99
94
96
April
98.3
97
99
98
May
95.5
100
90
99
June
94.8
100
97
97
July
85.6
89
58
92
93
August
85.0
84
79
92
85
September
94.9
98
91
99
94
October
97.5
97
100
99
99
November
98.2
95
100
100
99
December
95.8
91
99
95
Average
91.2
84.9
94.2
88.3
94.4
92.7
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.