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
93.3
97
95
89
95
February
90.7
97
94
78
0
92
March
91.3
96
93
83
100
86
April
93.1
94
90
100
95
May
93.2
96
90
96
June
98.4
100
96
98
July
98.5
99
95
100
99
August
98.5
99
99
0
94
September
98.8
100
98
100
October
92.8
98
87
November
88.2
95
88
86
0
December
88.0
93
84
76
Average
92.5
96.6
96.1
90.0
80.7
93.9
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.