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
97.4
100
96
95
98
97
February
96.3
97
98
98
99
96
March
94.3
94
95
91
94
98
April
96.6
97
95
99
98
May
97.7
100
98
97
98
June
98.7
99
96
100
99
July
98.9
100
98
100
99
August
99.6
99
99
100
100
September
99.9
100
100
100
100
October
99.9
100
100
100
100
November
99.6
100
99
100
100
December
99.3
99
100
100
100
Average
98.0
96.8
98.3
97.4
98.9
98.7
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.