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
96.3
99
98
100
100
87
February
95.2
100
94
100
100
80
March
94.6
100
90
100
100
100
April
93.3
97
70
100
100
May
93.9
100
94
100
June
97.1
97
90
100
100
July
98.6
99
100
100
88
August
98.4
95
100
100
100
September
97.5
97
100
96
100
October
94.8
89
100
93
100
November
94.6
98
100
100
100
December
96.7
94
100
96
Average
96.1
99.5
95.3
96.7
97.4
94.0
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.