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
67
0
February
85.7
100
75
100
March
69.2
100
43
April
22.2
0
40
May
23.0
23
June
30.0
30
0
July
41.3
39
60
0
0
August
71.4
77
57
100
September
71.4
80
71
50
October
75.0
100
0
November
64.2
89
20
December
52.9
57
50
Average
58.6
66.6
53.3
54.7
60.0
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
5.9
6
7
February
10.2
7
11
13
March
12.8
13
13
April
16.3
17
16
May
19.2
19
June
22.1
22
21
July
25.4
25
26
25
22
August
26.6
27
27
27
September
24.5
25
24
24
October
21.1
20
25
November
14.4
13
16
December
6.4
9
5
Average
16.3
13.1
18.7
19.7
23.0
16.7
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
5.7
6
7
February
10.2
7
11
13
March
12.2
13
12
April
15.0
16
15
May
18.6
19
June
21.5
22
21
July
24.9
25
26
25
22
August
26.0
26
26
27
September
23.6
24
23
24
October
20.8
20
24
November
12.7
11
14
December
5.8
8
4
Average
15.9
12.4
18.1
18.7
23.0
16.7
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
50.0
50
0
February
57.1
0
75
100
March
61.5
50
71
April
66.6
50
80
May
61.5
62
June
70.0
70
0
July
51.7
44
100
0
0
August
52.3
39
86
0
September
61.9
80
57
50
October
75.0
100
0
November
64.2
67
60
December
88.2
86
90
Average
54.1
41.6
60.9
73.8
40.0
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
20.0
20
0
February
10.4
21
7
4
March
10.3
15
6
April
11.6
7
15
May
9.6
10
June
11.0
11
0
July
9.0
8
12
0
15
August
6.4
6
8
4
September
14.7
11
14
30
October
9.0
10
5
November
16.4
16
18
December
22.4
20
24
Average
14.0
13.2
10.8
15.3
16.6
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
342°
360°
February
052°
123°
213°
March
133°
073°
April
146°
117°
May
129°
June
123°
360°
July
194°
119°
360°
129°
August
045°
239°
360°
September
180°
119°
023°
October
080°
180°
November
332°
021°
December
340°
341°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.