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
90.4
90
87
85
88
90
February
92.2
90
92
92
96
95
March
93.2
92
88
94
95
92
April
93.7
93
91
87
100
May
95.9
94
93
98
96
June
98.2
95
98
99
99
July
98.2
97
98
99
98
August
98.3
98
98
99
96
September
93.8
95
83
94
97
October
91.5
81
90
93
92
November
94.1
95
96
95
91
December
90.8
94
82
89
88
Average
93.6
90.4
92.1
91.3
93.7
93.9
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.