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
91.3
98
72
91
100
90
February
92.8
92
86
96
99
99
March
92.7
94
94
84
95
95
April
96.4
100
95
100
92
May
96.6
100
89
100
99
June
99.9
100
100
100
100
July
97.9
100
90
99
100
August
99.8
99
100
100
100
September
99.8
99
100
100
100
October
99.9
100
100
100
100
November
93.1
92
97
96
85
December
90.6
94
70
87
92
Average
95.9
94.4
95.2
93.5
98.1
96.3
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.