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
92.7
82
99
97
99
77
February
89.6
81
100
89
79
91
March
97.9
100
100
99
97
97
April
99.4
97
100
100
100
May
100.0
100
100
100
100
June
99.1
100
99
100
96
July
99.7
100
99
100
100
August
99.2
100
98
100
100
September
99.1
100
99
98
99
October
99.1
100
100
99
100
November
99.0
100
99
100
99
December
88.9
75
100
95
100
Average
96.2
87.9
97.5
98.1
97.2
96.6
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.