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
93.4
97
95
94
88
96
February
94.6
98
82
99
96
99
March
74.1
80
39
97
75
60
April
81.2
43
98
90
71
May
98.2
99
99
100
100
June
99.1
100
100
100
100
July
98.6
100
97
98
100
August
98.2
99
99
98
97
September
97.9
99
97
99
97
October
97.3
96
97
99
100
November
96.5
97
98
97
98
December
92.6
93
95
92
93
Average
93.1
91.3
86.7
97.5
94.4
92.4
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.