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
94.1
98
99
91
89
99
February
92.5
90
95
93
89
100
March
89.0
84
79
89
96
93
April
89.6
94
89
91
99
May
88.4
88
91
97
93
June
97.6
93
93
100
100
July
99.7
100
99
100
100
August
99.2
99
100
96
100
September
99.4
100
100
98
100
October
98.6
98
98
99
99
November
97.0
95
100
98
100
December
95.6
95
88
94
95
Average
94.8
90.5
94.3
94.6
96.0
98.2
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.