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
95.1
97
100
99
92
92
February
95.7
98
99
97
91
93
March
98.4
99
98
100
99
99
April
98.4
100
97
97
98
May
99.2
100
99
99
100
June
99.4
100
99
100
99
July
99.1
99
99
99
99
August
99.1
100
100
99
98
September
98.7
100
99
99
99
October
98.9
100
99
100
98
November
99.5
100
100
100
99
December
97.4
98
100
99
97
Average
98.2
98.0
99.3
98.9
97.8
97.5
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.