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
97.5
99
90
98
99
96
February
97.2
98
99
85
99
99
March
92.4
99
100
99
44
98
April
98.2
99
98
93
97
May
98.5
100
94
98
100
June
96.7
91
98
93
98
July
97.2
95
99
98
92
August
97.4
100
94
99
92
September
99.2
100
99
99
99
October
97.7
99
93
96
98
November
98.0
99
100
98
94
December
96.0
100
100
99
77
Average
97.2
98.7
97.5
96.3
92.8
94.7
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.