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
2021
January
93.7
97
89
96
February
91.6
81
97
98
March
82.0
76
100
69
April
87.3
100
75
May
98.3
97
98
June
99.0
98
100
July
99.1
99
99
0
August
99.0
98
99
100
September
93.9
89
95
October
98.5
96
100
November
94.4
92
95
December
91.0
88
99
Average
94.3
84.1
94.7
93.3
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.