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
88.6
92
79
96
February
96.7
99
94
98
March
96.5
94
99
96
April
94.9
97
92
96
May
95.3
92
99
June
95.6
93
98
July
99.3
100
99
August
94.6
94
95
September
95.5
94
97
October
88.6
99
79
November
82.3
94
71
December
77.8
77
80
Average
93.8
95.6
92.7
93.2
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.