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
97.8
100
100
99
97
97
February
98.0
100
98
100
96
March
99.2
100
100
99
100
April
97.9
100
99
100
100
May
98.1
100
100
100
100
June
99.3
100
100
100
100
July
99.4
100
100
100
August
97.4
100
100
98
September
99.6
100
100
100
100
October
98.7
100
100
100
97
November
99.2
100
100
100
99
December
98.5
100
100
92
100
Average
98.8
100.0
100.0
99.4
98.5
98.3
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.