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
96.7
99
92
100
100
0
February
99.4
100
99
99
100
100
March
99.2
100
99
99
100
0
April
99.7
100
100
100
May
99.7
100
100
100
100
June
99.8
100
100
100
July
100.0
100
100
100
100
August
100.0
100
100
100
100
September
100.0
100
100
100
100
October
98.8
98
100
0
November
98.4
99
98
100
100
December
97.6
98
98
50
Average
97.4
99.5
98.7
99.6
100.0
84.6
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.