Percentage of observations where the VFR minimums for ceiling and visibility are met: visibility of 5 mi 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
88
84
February
88.8
92
89
72
March
93.0
91
93
95
April
91.8
89
99
May
96.5
95
98
June
97.9
98
98
July
99.2
99
99
August
96.8
98
96
September
97.3
98
97
October
95.9
95
97
November
82.2
90
75
December
90.4
94
85
Average
92.7
90.4
93.7
93.9
Marginal VFR conditions or better during daylight period
Percentage of observations where the MVFR minimums for ceiling and visibility are met: visibility of 3⅛ mi or more and a ceiling of 1,000 ft or more. Only observations between sunrise and sunset are taken into account.