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
95.9
97
98
90
97
93
February
93.3
96
98
94
93
86
March
96.5
98
100
87
98
98
April
97.4
99
99
98
100
May
98.9
100
98
100
100
June
99.4
100
100
99
100
July
99.2
100
100
99
100
August
98.6
99
100
96
100
September
98.7
99
100
100
99
October
97.3
97
95
99
98
November
97.1
99
98
100
92
December
92.9
93
98
95
94
Average
97.3
97.2
98.5
96.6
97.8
97.1
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.