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
95.6
86
97
100
100
100
February
96.5
92
90
98
100
100
March
99.4
100
100
100
100
100
April
98.1
96
100
97
99
May
99.2
100
99
99
99
June
98.9
100
99
99
98
July
98.8
100
100
99
99
August
99.1
99
99
100
100
September
98.9
99
100
98
99
October
97.6
98
98
99
94
November
98.4
100
98
99
99
December
99.2
100
100
100
100
Average
97.7
92.3
98.2
99.1
99.0
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.