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
94.6
100
95
93
97
February
94.6
96
98
92
98
March
96.9
97
96
99
93
April
97.6
98
98
95
98
May
96.6
98
99
96
91
June
98.4
97
99
99
98
July
99.1
100
99
97
99
August
97.9
99
99
98
September
97.5
98
99
95
97
October
93.4
98
91
95
94
November
91.3
98
97
78
91
December
88.3
94
66
89
94
Average
96.4
100.0
97.4
95.7
93.6
95.7
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.