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
January
100.0
100
100
100
February
89.6
75
89
100
March
73.6
67
100
60
April
80.0
80
100
67
May
100.0
100
100
June
64.7
63
67
July
90.9
75
100
August
80.0
78
83
September
93.3
100
90
October
81.2
100
63
November
95.0
100
75
December
100.0
100
100
Average
86.0
79.4
92.2
86.4
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
January
7.4
8
7
7
February
8.0
9
9
6
March
11.9
11
14
12
April
17.1
16
17
19
May
23.3
23
24
June
23.9
24
25
July
28.4
29
28
August
29.0
28
30
September
26.0
27
25
October
20.5
22
19
November
15.1
16
14
December
11.3
13
10
Average
15.7
10.9
19.1
17.2
Average highest temperature per day
The maximum temperature is typically observed some hours after noon.
Minimum temperatures (°C)
Month
Average
2024
2023
2022
January
6.4
8
6
6
February
7.3
9
7
6
March
10.9
10
14
11
April
16.6
15
17
18
May
22.0
21
23
June
23.8
24
24
July
27.4
28
27
August
28.3
27
30
September
25.5
27
25
October
19.7
22
18
November
14.3
15
13
December
11.1
13
10
Average
15.1
10.4
18.4
16.4
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
January
15.1
14
22
12
February
31.0
63
44
0
March
42.1
44
20
60
April
75.0
70
75
83
May
57.1
44
80
June
64.7
63
67
July
63.6
25
86
August
73.3
89
50
September
60.0
80
50
October
56.2
38
75
November
45.0
31
100
December
9.0
0
14
Average
47.1
50.0
44.4
46.8
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
January
14.7
12
17
15
February
12.5
6
14
16
March
9.8
11
9
8
April
8.0
7
10
9
May
8.5
10
7
June
6.8
7
7
July
7.0
10
6
August
9.7
12
6
September
8.4
6
10
October
8.5
10
8
November
13.4
14
10
December
14.0
12
15
Average
10.2
8.8
11.4
10.5
Average wind speed
Excluding wind gusts. Only observations between sunrise and sunset are taken into account.
Prevailing wind direction
Month
2024
2023
2022
January
303°
298°
300°
February
316°
302°
297°
March
315°
319°
293°
April
123°
292°
103°
May
286°
147°
June
162°
090°
July
010°
102°
August
108°
063°
September
114°
199°
October
334°
315°
November
299°
174°
December
315°
298°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.