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
7.3
0
0
0
0
February
3.4
0
0
0
0
March
2.6
0
0
0
0
0
April
3.9
0
0
0
0
May
5.3
0
0
0
0
June
7.3
0
0
0
0
July
6.7
0
0
0
0
August
6.6
0
0
0
0
September
6.3
0
0
0
0
October
8.9
0
0
0
0
November
5.3
0
0
0
0
December
2.3
0
0
0
0
Average
9.1
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.