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
95.2
87
99
100
94
100
February
91.5
81
95
96
81
100
March
84.6
65
97
83
84
85
April
83.9
72
71
78
99
May
87.9
85
92
86
87
June
86.1
84
90
66
83
July
76.1
57
74
80
87
August
80.1
84
63
75
76
September
88.9
82
80
87
97
October
97.4
97
90
100
100
November
98.4
95
100
100
100
December
99.2
98
100
100
99
Average
87.3
76.8
86.3
85.3
85.0
92.0
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.