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
100.0
100
100
100
100
100
February
96.5
100
100
100
100
100
March
93.4
100
89
85
93
95
April
97.1
98
99
100
95
May
89.7
98
92
96
93
June
85.9
83
87
100
85
July
87.2
97
92
81
90
August
86.0
78
91
81
91
September
94.6
92
95
100
96
October
98.9
100
99
97
100
November
99.8
100
100
100
100
December
99.9
100
100
100
99
Average
94.3
100.0
94.0
94.3
95.2
94.8
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.