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
96.9
95
100
99
100
90
February
94.9
98
91
97
87
93
March
94.8
93
100
90
97
100
April
97.5
100
100
99
96
May
98.3
100
96
94
100
June
99.2
99
99
99
99
July
98.6
99
99
99
99
August
98.4
97
99
99
99
September
98.9
98
98
99
99
October
96.9
89
99
100
100
November
96.4
93
96
100
100
December
96.2
91
100
100
100
Average
97.0
95.0
96.3
97.5
97.7
97.9
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.