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
92.9
95
94
87
94
92
February
92.9
96
85
91
95
98
March
94.7
98
100
93
94
96
April
95.5
96
100
95
95
May
96.1
94
98
95
98
June
94.6
90
96
92
95
July
92.4
95
94
93
81
August
92.7
92
91
96
89
September
94.8
96
89
96
94
October
93.7
93
92
100
89
November
91.1
86
86
86
90
December
94.5
95
100
98
89
Average
94.2
96.6
93.3
93.5
94.4
92.0
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.