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
100.0
100
100
100
February
96.6
91
100
100
March
100.0
100
100
100
April
100.0
100
100
May
99.7
100
100
June
100.0
100
100
July
98.1
97
99
August
97.7
98
97
September
97.3
100
95
October
93.8
95
93
November
94.8
91
100
December
97.9
97
100
Average
97.8
96.8
98.0
98.5
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.