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
93.0
85
100
100
96
78
February
86.8
84
97
85
72
87
March
97.7
100
98
96
100
100
April
99.3
98
100
100
99
May
98.2
100
99
97
99
June
91.6
100
91
93
73
July
98.8
100
100
100
97
August
99.5
100
100
97
100
September
99.8
100
100
100
100
October
98.8
100
100
100
99
November
99.7
100
100
100
100
December
96.6
93
100
98
100
Average
96.3
90.1
98.9
97.4
96.2
94.5
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.