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
61.4
98
98
0
0
February
70.3
100
99
21
0
100
March
81.8
100
98
81
0
0
April
68.9
100
81
0
0
May
70.7
100
83
0
0
June
84.6
97
98
0
July
91.2
99
97
0
0
August
85.5
100
100
0
0
September
58.6
100
98
0
21
October
50.6
100
100
0
29
November
67.2
100
100
0
0
December
69.1
100
100
0
0
Average
74.6
99.4
99.2
77.4
21.3
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.