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
98.0
97
100
100
100
100
February
95.6
98
100
100
99
100
March
83.3
99
100
99
98
99
April
93.8
100
99
99
100
May
99.5
100
100
100
98
June
98.5
99
97
98
99
July
92.8
100
100
99
55
August
95.3
100
100
98
99
September
99.6
100
100
100
100
October
99.2
100
100
100
98
November
92.3
96
56
100
100
December
98.9
98
100
100
99
Average
95.6
98.0
99.2
95.6
99.1
95.7
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.