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
98.7
99
100
100
99
96
February
98.7
97
100
100
96
100
March
96.7
94
100
93
100
94
April
99.7
100
100
100
100
May
99.8
100
100
100
100
June
99.7
100
99
100
99
July
98.4
100
98
98
99
August
99.2
100
99
99
99
September
99.3
100
98
100
99
October
99.7
100
100
99
99
November
98.8
100
100
100
99
December
98.1
100
100
100
96
Average
98.7
96.3
99.9
98.8
99.3
98.3
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.