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
99.5
99
100
100
February
100.0
100
100
100
100
March
100.0
100
100
100
April
100.0
100
100
0
May
97.6
98
100
100
June
99.7
100
100
100
July
99.7
100
100
August
99.7
100
100
September
99.6
100
99
100
October
100.0
100
100
100
0
November
100.0
100
100
December
99.8
100
100
0
Average
99.8
99.7
99.6
99.9
100.0
100.0
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.