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
96.1
94
96
88
100
97
February
94.6
95
91
97
95
91
March
93.4
98
91
99
92
91
April
96.4
97
95
94
93
May
97.9
100
93
99
96
June
0
0
0
0
July
94.1
94
100
90
98
August
97.7
94
98
99
99
September
98.5
98
98
100
100
October
97.1
98
98
96
98
November
95.5
93
92
99
100
December
0
0
0
0
Average
96.4
96.4
95.5
96.5
96.3
96.1
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.