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
96.8
97
95
99
99
96
February
97.2
94
97
100
98
98
March
95.2
90
97
96
97
91
April
95.0
97
92
96
96
May
94.6
98
95
90
94
June
94.8
96
95
97
93
July
98.3
99
99
98
95
August
98.6
99
100
97
100
September
96.2
99
97
98
97
October
96.3
99
99
100
98
November
98.3
98
97
99
99
December
98.1
98
100
96
100
Average
96.2
93.3
97.6
97.0
96.9
96.3
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.