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
2020
January
94.2
96
94
100
95
91
February
95.7
95
97
100
96
91
March
94.5
93
97
99
91
95
April
95.4
92
100
100
97
96
May
95.6
97
99
92
92
June
95.7
93
99
95
97
July
90.3
89
96
94
74
August
92.6
91
96
93
89
September
92.1
89
99
94
92
October
95.6
100
99
97
100
November
96.4
99
99
94
94
December
95.4
93
100
99
98
Average
94.4
93.8
94.6
98.6
94.7
92.1
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.