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
97
96
96
94
95
February
96.2
93
97
95
93
97
March
96.4
98
97
92
94
97
April
94.4
94
95
93
87
May
94.3
95
94
97
90
June
96.4
94
97
97
95
July
98.2
100
100
98
95
August
96.1
98
95
95
95
September
96.0
99
94
95
96
October
94.2
94
93
92
96
November
94.1
91
97
95
92
December
95.5
93
100
92
97
Average
95.8
96.2
95.6
95.4
94.5
94.3
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.