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
97.6
99
98
100
100
100
February
98.8
100
100
97
100
100
March
99.3
100
100
100
99
100
April
99.4
100
100
100
99
May
99.5
100
99
99
100
June
99.2
100
99
100
99
July
99.1
100
100
100
100
August
98.5
99
100
99
100
September
97.8
99
99
99
100
October
96.6
100
100
81
100
November
95.7
94
99
96
98
December
95.6
97
87
97
98
Average
98.3
99.3
98.9
98.7
97.5
99.4
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.