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
95.5
89
100
88
99
97
February
97.9
94
100
95
100
100
March
98.5
99
99
97
97
April
98.8
100
100
99
100
May
99.2
99
99
100
100
June
99.4
99
99
99
99
July
97.8
98
99
99
95
August
99.3
100
100
99
100
September
99.4
100
99
100
99
October
99.0
99
100
99
100
November
98.3
98
100
100
100
December
98.5
98
100
100
96
Average
97.6
91.2
99.0
97.8
99.1
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.