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
92.4
94
87
94
93
92
February
98.7
98
98
99
98
99
March
99.2
100
99
99
100
99
April
98.7
96
99
100
99
May
100.0
100
100
100
100
June
99.8
100
100
100
100
July
99.2
99
100
100
99
August
97.7
97
100
96
98
September
98.8
98
100
99
98
October
99.5
99
100
99
100
November
99.1
98
100
100
97
December
94.7
82
100
98
99
Average
98.3
97.6
96.6
99.2
98.5
98.5
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.