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
85.7
79
93
February
86.9
82
92
March
98.1
98
April
92.8
92
96
May
96.6
96
97
June
94.6
96
93
July
99.7
100
100
August
99.0
99
99
September
98.4
98
98
October
96.6
98
95
November
91.1
92
90
December
82.2
78
90
Average
90.5
80.5
95.0
96.0
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.