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
86.3
92
92
86
86
100
February
92.3
93
93
98
87
89
March
89.4
89
88
94
89
89
April
92.6
93
88
93
92
May
90.8
86
86
94
91
June
0
0
0
0
July
0.0
0
0
0
0
August
89.1
92
94
90
82
September
94.6
90
93
98
99
October
97.1
96
99
93
92
November
96.5
94
100
94
100
December
0
0
0
0
Average
91.7
90.0
91.4
94.1
92.2
89.5
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.