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
95.8
91
97
99
94
99
February
96.9
98
92
94
100
97
March
96.4
95
93
98
97
98
April
97.8
98
100
98
100
May
96.6
98
93
96
98
June
93.4
95
90
94
98
July
96.1
100
91
97
99
August
94.5
100
94
97
93
September
96.0
100
94
99
99
October
90.2
100
98
92
100
November
97.0
100
99
93
99
December
96.8
99
92
97
97
Average
95.5
94.6
97.5
95.0
96.0
98.0
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.