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
80.6
98
88
84
0
88
February
85.5
95
99
98
0
97
March
87.7
95
99
100
17
96
April
90.8
99
100
39
99
May
98.9
98
100
100
100
June
99.1
97
99
99
99
July
99.4
99
100
100
98
August
99.2
99
99
100
98
September
99.1
100
99
99
98
October
96.4
100
98
99
87
November
79.7
96
95
92
5
December
76.8
89
88
89
0
Average
92.7
95.8
97.3
97.4
73.1
84.5
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.