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
92.7
100
94
83
95
February
95.9
98
99
90
98
March
91.5
97
99
86
85
April
92.9
97
99
80
95
May
90.1
98
74
99
June
92.9
100
96
84
July
96.8
100
95
96
August
93.8
100
85
98
September
97.7
100
97
96
99
October
99.5
99
100
100
99
November
98.8
99
99
100
98
December
96.3
98
96
99
93
Average
95.6
97.7
98.5
89.5
95.2
96.9
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.