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
93.5
96
99
93
90
99
February
96.4
100
94
88
100
97
March
97.1
99
96
98
90
100
April
97.9
98
97
98
99
May
98.1
99
97
98
98
June
98.6
99
99
99
99
July
91.6
98
98
54
97
August
96.6
98
99
97
98
September
92.1
98
99
99
99
October
96.1
96
94
98
99
November
94.9
97
95
98
97
December
90.9
93
94
87
94
Average
95.6
98.2
97.0
95.8
92.0
98.1
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.