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
84.5
90
83
85
86
79
February
90.2
86
90
96
93
91
March
94.1
89
100
90
93
94
April
97.5
99
100
100
94
May
99.4
100
99
100
98
June
99.6
99
100
100
100
July
99.7
100
99
99
100
August
99.7
100
100
100
100
September
99.9
100
100
100
100
October
98.6
100
97
98
100
November
90.5
94
93
87
91
December
82.4
84
76
92
62
Average
94.6
88.2
96.3
95.6
96.2
93.3
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.