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
95.7
100
95
97
95
97
February
95.3
96
92
95
96
99
March
90.8
97
90
91
92
93
April
93.3
93
95
94
88
May
98.5
100
100
98
99
June
98.5
99
98
98
98
July
98.6
100
98
98
100
August
99.4
100
100
100
99
September
98.4
100
96
99
98
October
97.4
99
93
100
99
November
97.1
99
96
98
93
December
96.2
98
93
95
97
Average
96.7
97.7
97.0
96.0
96.9
96.6
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.