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
73.1
85
81
67
68
69
February
81.7
68
81
82
86
86
March
86.2
83
97
90
92
86
April
90.6
88
92
94
93
May
87.5
84
89
95
92
June
84.9
86
91
71
91
July
91.4
90
95
89
91
August
91.1
91
94
88
93
September
89.9
91
93
88
93
October
88.4
93
89
91
91
November
82.8
82
83
81
84
December
78.5
87
75
76
77
Average
85.4
78.5
87.9
88.2
85.4
88.0
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.
Maximum temperatures (°C)
Month
Average
2024
2023
2022
2021
2020
January
7.6
7
8
8
7
9
February
9.5
11
9
10
9
11
March
11.7
12
12
14
12
11
April
14.4
13
14
12
18
May
17.2
17
18
15
18
June
21.2
23
21
20
20
July
22.4
21
24
21
21
August
22.1
21
25
20
24
September
20.0
23
19
21
20
October
16.2
18
18
16
15
November
11.2
11
13
10
13
December
8.7
10
4
9
9
Average
14.6
10.1
15.5
16.0
14.3
15.5
Average highest temperature per day
The maximum temperature is typically observed some hours after noon.