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
January
53.0
39
98
0
February
44.4
74
89
0
March
63.7
97
24
81
April
83.0
58
97
78
May
42.7
71
95
0
June
50.4
98
0
July
17.0
97
0
August
37.0
96
0
September
46.3
99
0
October
92.0
92
November
78.9
95
0
December
13.1
82
92
0
Average
54.6
59.2
92.3
50.0
17.0
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.