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
99.0
100
99
99
99
99
February
99.0
100
100
99
99
100
March
99.3
99
100
99
100
99
April
95.1
99
99
99
76
May
91.4
86
96
99
82
June
95.9
98
96
99
87
July
97.9
99
98
99
98
August
96.4
98
96
96
94
September
96.0
100
95
96
94
October
95.0
95
97
99
94
November
96.5
98
100
100
88
December
99.0
100
100
99
99
Average
96.9
99.5
97.5
97.6
98.4
93.8
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.