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
86.4
81
85
97
73
86
February
93.6
93
100
100
93
83
March
93.2
92
95
88
99
95
April
96.1
100
97
95
94
May
99.4
98
100
100
99
June
99.5
98
100
100
100
July
99.9
100
100
100
100
August
99.8
100
100
100
100
September
98.9
96
100
99
99
October
95.3
93
98
95
93
November
88.1
72
87
98
88
December
82.0
87
60
88
78
Average
94.5
88.8
94.5
95.7
95.7
94.0
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.