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
January
86.8
90
95
85
February
92.4
97
92
99
March
98.1
96
100
96
April
98.6
99
97
May
99.5
99
100
June
99.6
99
100
July
100.0
100
100
August
99.7
100
100
100
September
98.4
100
98
October
95.5
96
95
November
90.8
99
86
December
82.1
91
67
Average
94.5
94.5
97.9
95.6
100.0
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.