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
99.3
100
100
100
99
100
February
99.3
100
100
100
100
98
March
99.1
100
100
100
99
100
April
97.7
100
100
98
100
May
95.9
100
100
99
100
June
94.7
98
99
98
98
July
95.8
100
99
98
99
August
96.6
100
99
95
96
September
98.5
100
100
97
100
October
98.5
100
100
99
96
November
99.5
100
100
100
99
December
99.2
100
100
100
99
Average
98.4
100.0
99.7
99.7
98.3
98.6
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.