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
66.6
81
78
61
61
59
February
79.7
67
79
82
89
86
March
86.5
81
97
88
92
88
April
91.4
86
90
94
98
May
89.6
86
92
92
96
June
89.9
92
93
81
93
July
93.5
91
98
89
93
August
91.8
91
96
91
92
September
89.6
93
91
86
91
October
86.5
90
87
86
86
November
74.5
80
68
75
76
December
66.3
78
54
63
69
Average
84.6
76.8
87.5
86.7
84.6
87.5
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
6.8
6
8
7
6
8
February
9.3
11
9
10
9
11
March
11.9
12
11
13
12
12
April
15.2
13
14
13
20
May
18.4
18
19
16
20
June
23.0
25
23
22
22
July
24.6
23
26
23
24
August
23.9
23
27
21
26
September
21.0
24
19
22
22
October
16.5
18
18
16
15
November
10.6
11
11
10
12
December
7.9
9
3
9
8
Average
14.9
9.7
15.9
16.3
14.9
16.4
Average highest temperature per day
The maximum temperature is typically observed some hours after noon.