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
96.9
96
96
98
94
100
February
98.2
100
96
97
97
98
March
99.0
100
100
97
99
98
April
98.6
100
98
100
96
May
99.2
100
100
99
100
June
99.1
100
98
99
99
July
97.4
98
94
99
98
August
99.3
99
99
100
100
September
98.1
99
98
95
100
October
98.5
100
98
96
99
November
99.0
99
97
99
99
December
98.5
99
100
100
100
Average
98.5
98.5
98.6
97.5
98.3
98.9
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.