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
99.6
100
100
100
99
100
February
98.8
99
99
99
99
100
March
98.8
100
99
97
100
97
April
98.8
100
99
100
97
May
98.3
100
99
99
100
June
99.6
100
100
100
100
July
99.5
100
100
99
100
August
98.5
99
98
96
99
September
94.4
99
98
100
99
October
96.3
99
99
100
99
November
85.6
100
98
99
98
December
94.2
99
100
99
99
Average
97.3
99.7
99.4
98.8
99.3
99.0
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.