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
2020
January
93.8
95
95
86
February
91.7
93
98
88
March
91.5
94
100
76
April
95.0
100
96
May
96.0
100
97
June
94.1
97
99
July
96.0
94
98
August
96.5
95
98
September
96.9
98
98
October
93.5
94
92
100
November
95.2
97
91
December
96.7
93
97
Average
95.6
93.9
96.1
93.4
100.0
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.