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
89.7
100
88
84
91
98
February
91.4
96
95
91
95
97
March
88.4
98
92
89
93
79
April
92.2
94
86
95
92
May
94.1
98
93
91
96
June
98.6
94
100
100
99
July
99.7
100
100
99
100
August
99.6
100
100
99
100
September
99.1
98
100
99
100
October
98.2
99
99
94
98
November
97.1
97
100
93
99
December
93.8
98
95
87
90
Average
95.4
98.0
96.2
94.7
94.9
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.