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
95.2
82
100
100
99
100
February
90.1
86
99
96
90
88
March
95.5
99
99
97
96
99
April
96.9
94
100
100
100
99
May
98.0
100
99
96
100
June
95.7
98
98
94
92
July
98.6
100
100
100
97
August
99.5
100
100
100
100
September
98.9
100
100
100
100
October
98.9
100
100
100
100
November
99.3
100
100
100
100
December
94.5
93
100
100
100
Average
96.2
90.5
98.9
98.9
97.7
97.7
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.