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
93.6
91
95
94
February
92.5
96
92
90
March
95.1
95
95
96
April
95.2
94
97
May
96.8
97
97
June
97.7
98
97
July
99.3
100
99
August
97.4
97
98
September
96.8
98
96
October
96.8
96
98
November
90.7
92
89
December
94.0
94
94
Average
94.9
93.8
95.2
95.7
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.