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
2025
2024
2023
2022
January
62.5
100
0
February
62.5
63
0
0
March
33.3
29
50
33
April
28.5
0
40
May
15.7
17
14
June
10.0
12
0
July
16.6
18
13
0
August
45.7
50
30
54
September
50.0
46
67
50
October
55.5
100
67
25
November
57.8
78
25
100
December
60.8
100
17
64
Average
43.2
60.0
31.7
26.8
54.2
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
2025
2024
2023
2022
January
-4.6
-2.1
-5.0
February
-1.8
-2.7
1.5
2.2
March
5.1
3.9
6.7
6.0
April
10.2
10.6
9.9
May
14.2
14.4
14.0
June
19.7
20.5
18.5
July
22.9
23.3
22.8
22.1
August
24.8
26.5
23.8
23.6
September
21.8
23.3
21.0
19.3
October
15.1
16.8
16.5
13.4
November
8.2
8.9
7.0
8.9
December
1.5
2.2
3.9
-1.0
Average
11.3
0.8
17.9
12.8
13.6
Average highest temperature per day
The maximum temperature is typically observed some hours after noon.
Minimum temperatures (°C)
Month
Average
2025
2024
2023
2022
January
-5.7
-4.7
-6.9
February
-1.0
-3.7
1.0
2.2
March
4.2
2.7
6.2
5.2
April
9.4
10.0
9.0
May
13.5
13.9
12.9
June
19.0
19.5
18.3
July
22.2
22.3
22.1
22.1
August
24.3
25.6
23.1
23.5
September
20.6
21.6
19.8
19.3
October
14.0
15.5
15.5
12.4
November
6.7
6.9
5.0
8.4
December
0.8
1.5
3.3
-2.1
Average
10.4
-1.7
16.9
12.0
13.1
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2025
2024
2023
2022
January
87.5
80
100
February
62.5
63
0
0
March
20.0
29
50
0
April
28.5
25
30
May
42.1
42
43
June
25.0
24
33
July
35.0
31
50
100
August
34.2
17
70
23
September
55.5
64
33
50
October
55.5
50
33
75
November
73.6
78
75
50
December
69.5
67
50
82
Average
48.7
55.0
38.0
47.7
54.2
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
2025
2024
2023
2022
January
10.1
11
8
February
9.5
10
0
0
March
9.0
13
5
6
April
8.5
8
9
May
8.6
8
10
June
7.3
7
10
July
10.0
10
12
9
August
7.5
6
8
9
September
5.9
5
6
9
October
9.0
7
7
12
November
13.6
16
11
13
December
8.8
6
10
10
Average
9.6
11.1
8.5
8.9
9.8
Average wind speed
Excluding wind gusts. Only observations between sunrise and sunset are taken into account.
Prevailing wind direction
Month
2025
2024
2023
2022
January
284°
090°
February
022°
360°
360°
March
116°
270°
231°
April
225°
213°
May
241°
162°
June
164°
250°
July
205°
197°
082°
August
202°
195°
214°
September
090°
090°
139°
October
196°
340°
144°
November
286°
121°
245°
December
267°
360°
313°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.