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
75.7
78
85
71
71
72
February
79.2
63
91
78
84
59
March
85.0
86
81
88
91
83
April
89.9
83
89
98
87
May
85.7
80
87
90
92
June
80.5
82
82
78
85
July
84.3
84
91
85
77
August
83.9
79
88
86
86
September
82.0
86
84
85
78
October
78.8
86
82
84
80
November
85.7
81
92
89
79
December
76.4
76
84
69
88
Average
82.1
76.5
82.8
85.4
84.7
81.2
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.
Maximum temperatures (°C)
Month
Average
2024
2023
2022
2021
2020
January
9.4
9
9
10
9
10
February
10.6
12
10
11
10
11
March
11.8
12
11
14
12
11
April
14.5
14
14
14
17
May
17.0
16
18
15
19
June
19.6
22
20
19
19
July
21.3
20
23
21
20
August
20.8
20
24
20
22
September
19.4
22
19
21
19
October
16.2
18
18
17
15
November
12.4
12
14
12
14
December
10.3
12
7
11
10
Average
14.8
10.8
15.5
16.2
14.7
15.5
Average highest temperature per day
The maximum temperature is typically observed some hours after noon.