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
95.0
96
97
93
98
86
February
98.1
98
98
97
100
98
March
94.8
99
89
91
96
94
April
96.5
98
89
98
100
May
98.5
100
98
100
100
June
97.6
100
94
97
100
July
97.9
99
100
99
100
August
99.6
100
100
99
100
September
91.4
100
100
98
97
October
98.6
100
100
100
93
November
98.5
99
100
100
100
December
97.9
100
98
99
99
Average
96.9
97.5
98.4
96.4
98.5
95.8
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.