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
76.7
73
78
80
February
84.7
77
95
83
March
94.0
92
94
96
April
89.4
93
86
May
95.3
94
96
June
93.4
92
94
94
July
94.4
96
97
91
August
96.0
97
95
96
September
92.2
95
94
88
October
90.5
95
91
86
November
81.9
82
80
84
December
78.0
72
86
80
Average
88.1
81.5
91.2
90.9
88.8
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.