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
60.8
44
52
58
53
67
February
78.7
74
73
69
79
87
March
87.9
77
80
93
88
93
April
91.5
74
96
81
96
100
May
94.1
79
96
91
96
100
June
88.4
73
84
90
87
98
July
56.5
34
47
50
72
78
August
64.7
41
82
61
81
48
September
64.4
63
64
41
72
October
78.2
70
73
73
87
November
71.7
66
75
68
73
December
60.8
47
53
48
69
Average
74.6
61.7
71.9
72.1
73.4
79.4
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
28.0
29
28
27
29
27
February
32.2
32
34
32
33
32
March
35.6
35
35
37
37
33
April
39.3
38
38
41
40
39
May
40.0
41
39
40
38
40
June
36.7
37
36
37
36
36
July
32.3
31
32
32
34
34
August
31.6
31
33
32
33
30
September
32.7
33
34
31
34
October
34.8
36
34
34
35
November
32.6
33
33
33
33
December
28.9
30
31
28
30
Average
33.8
34.3
33.7
34.2
33.5
33.4
Average highest temperature per day
The maximum temperature is typically observed some hours after noon.
Minimum temperatures (°C)
Month
Average
2024
2023
2022
2021
2020
January
13.8
15
13
13
15
14
February
16.1
18
16
15
16
16
March
20.7
20
21
22
21
20
April
25.6
25
25
25
26
30
May
28.0
28
27
28
28
30
June
25.3
24
23
26
27
25
July
20.4
11
10
19
26
25
August
19.9
11
18
17
27
20
September
22.3
18
23
19
24
October
23.3
24
22
24
24
November
18.0
18
18
18
17
December
15.5
18
18
15
15
Average
20.7
18.8
19.2
20.3
21.6
21.5
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
0.0
0
0
0
0
0
February
0.0
0
0
0
0
0
March
0.2
0
2
0
0
0
April
0.0
0
0
0
0
0
May
0.4
0
0
0
4
0
June
2.4
2
6
1
3
2
July
15.1
17
17
19
9
7
August
15.2
20
4
13
4
34
September
7.1
9
4
13
4
October
0.3
0
1
0
0
November
0.3
0
0
1
0
December
1.8
0
0
5
3
Average
4.0
5.2
3.4
3.5
3.2
4.6
Precipitation during daylight period
Percentage of observations with observed rain, drizzle, snow or hail. Only observations between sunrise and sunset are taken into account.
Wind speed (knots)
Month
Average
2024
2023
2022
2021
2020
January
4.7
5
5
5
5
5
February
4.4
5
4
4
4
5
March
4.7
4
4
4
5
5
April
4.9
5
5
5
4
5
May
6.7
6
6
8
6
6
June
7.6
8
9
7
7
7
July
6.7
7
6
6
7
6
August
6.8
7
8
6
6
7
September
4.9
6
5
5
4
October
3.9
3
4
5
4
November
3.7
4
3
5
4
December
4.8
5
5
5
4
Average
5.4
5.9
5.4
5.3
5.2
5.2
Average wind speed
Excluding wind gusts. Only observations between sunrise and sunset are taken into account.
Prevailing wind direction
Month
2024
2023
2022
2021
2020
January
030°
023°
029°
016°
034°
February
003°
016°
360°
011°
042°
March
295°
270°
354°
316°
298°
April
277°
266°
262°
250°
296°
May
253°
247°
269°
225°
249°
June
222°
221°
233°
229°
218°
July
212°
229°
253°
223°
199°
August
224°
232°
227°
249°
211°
September
252°
276°
227°
245°
October
355°
025°
022°
022°
November
051°
042°
064°
028°
December
038°
035°
043°
033°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.