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
2020
January
96.5
93
97
96
February
95.5
92
100
99
March
84.4
90
100
65
April
91.2
98
83
May
95.6
94
94
June
93.7
96
85
July
95.0
92
99
August
93.1
96
86
September
93.2
93
87
October
98.2
98
97
November
98.2
96
100
100
December
98.3
100
100
Average
95.3
91.2
96.0
90.0
100.0
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.