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
85.5
89
96
68
87
82
February
89.1
85
87
92
89
94
March
90.4
94
96
89
95
93
April
88.3
89
88
95
84
May
88.1
84
91
95
89
June
83.9
82
90
74
94
July
94.3
96
97
90
95
August
92.9
92
90
93
94
September
90.6
95
93
86
83
October
88.7
94
92
93
94
November
88.9
87
96
95
83
December
88.5
91
75
80
94
Average
89.2
89.4
90.5
89.6
89.4
90.1
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.
Maximum temperatures (°C)
Month
Average
2024
2023
2022
2021
2020
January
8.8
8
9
9
8
10
February
10.3
12
10
11
9
12
March
11.9
13
12
13
12
11
April
13.9
14
14
12
16
May
16.6
16
18
15
18
June
19.5
21
20
18
19
July
21.8
21
24
21
21
August
21.5
21
23
20
23
September
19.9
23
20
21
20
October
16.6
19
18
17
15
November
12.0
12
14
11
14
December
9.8
11
6
10
10
Average
14.7
10.9
15.7
16.0
14.6
15.5
Average highest temperature per day
The maximum temperature is typically observed some hours after noon.