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
95.6
86
100
100
100
82
February
93.5
93
88
96
95
90
March
91.7
89
98
91
85
100
April
97.8
100
100
97
94
May
96.9
97
96
93
95
June
92.6
98
91
92
80
July
99.4
100
100
100
96
August
99.5
99
99
100
98
September
99.3
98
100
99
100
October
98.2
96
98
99
100
November
98.6
97
100
100
100
December
94.3
82
100
100
100
Average
95.7
89.2
96.0
97.3
96.6
94.5
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.