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
0.0
0
0
0
0
0
February
0.0
0
0
0
0
0
March
0.6
0
0
0
0
2
April
0.1
0
0
0
0
May
0.0
0
0
0
0
June
0.1
0
0
1
0
July
0.7
0
0
0
0
August
0.0
0
0
0
0
September
0.3
0
0
0
0
October
0.5
0
0
0
0
November
0.0
0
0
0
1
December
0.0
0
0
0
0
Average
0.2
0.0
0.0
0.2
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.