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
January
99.4
99
100
100
February
95.8
95
96
97
March
94.8
94
98
91
April
98.9
100
98
May
98.2
97
100
June
99.7
99
100
July
97.6
96
99
August
95.1
91
100
September
95.6
93
99
October
97.9
96
100
November
99.2
100
99
December
96.7
100
91
Average
96.9
95.5
96.8
98.5
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.