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
January
79.4
84
67
88
February
96.3
98
93
98
March
96.3
97
98
94
April
94.2
96
93
May
96.8
94
100
June
97.4
96
99
July
99.8
100
100
August
97.1
97
97
September
95.3
98
93
October
84.5
96
74
November
66.1
93
42
December
63.8
60
70
Average
91.5
93.4
91.9
89.2
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.