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
2021
January
61.1
59
59
58
25
77
February
58.7
58
50
46
66
91
March
64.8
62
77
60
77
69
April
68.6
63
64
78
70
May
77.2
83
85
69
78
66
June
0
0
0
0
0
July
95.7
99
86
96
97
August
86.6
87
93
92
69
September
71.4
58
66
74
78
October
63.0
72
68
53
45
November
62.3
67
70
57
62
December
0
0
0
0
Average
71.7
67.5
72.1
69.6
75.0
70.6
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
2021
January
-21.2
-21.6
-20.3
-27.3
-17.6
-26.5
February
-18.7
-18.1
-18.6
-13.5
-15.6
-28.1
March
-15.3
-13.4
-17.3
-14.0
-16.3
-22.5
April
-9.9
-10.4
-13.4
-7.0
-8.7
May
0.7
0.4
-3.7
-2.9
3.5
-1.9
June
11.6
12.5
10.0
11.1
16.3
8.3
July
18.0
18.3
18.8
18.1
15.5
August
17.1
17.3
17.8
14.0
14.6
September
7.2
7.0
6.9
4.2
7.9
October
-4.9
-5.0
-2.1
-1.3
-2.0
November
-14.5
-12.5
-13.8
-17.1
-14.4
December
-18.2
-12.0
-20.3
-16.1
-23.6
Average
-6.9
-8.5
-4.6
-4.2
-3.9
-6.0
Average highest temperature per day
The maximum temperature is typically observed some hours after noon.
Minimum temperatures (°C)
Month
Average
2025
2024
2023
2022
2021
January
-28.9
-28.5
-25.6
-34.5
-22.5
-33.1
February
-24.9
-25.8
-23.5
-19.5
-20.1
-35.6
March
-23.6
-20.5
-24.3
-23.5
-23.3
-29.1
April
-16.2
-20.8
-21.5
-15.3
-15.9
May
-5.1
-5.5
-8.5
-7.7
-4.9
-4.0
June
4.6
4.9
2.3
4.7
7.2
3.5
July
10.0
10.0
11.0
10.1
7.7
August
9.2
9.0
9.0
6.4
8.5
September
1.7
1.6
1.0
-1.1
2.2
October
-8.6
-11.9
-7.7
-3.0
-7.2
November
-20.1
-19.5
-19.8
-24.6
-20.5
December
-25.7
-17.1
-26.8
-24.0
-29.3
Average
-12.9
-15.9
-10.1
-11.6
-9.4
-13.8
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2025
2024
2023
2022
2021
January
61.9
57
86
56
92
18
February
61.7
52
69
84
68
23
March
61.0
53
40
70
63
61
April
54.2
62
61
37
63
May
31.2
18
36
53
32
23
June
0
0
0
0
0
July
3.5
3
3
7
5
August
8.7
6
7
12
17
September
24.7
31
31
32
21
October
56.6
51
48
64
60
November
65.2
76
63
49
70
December
0
0
0
0
Average
39.8
42.1
39.6
45.6
39.8
37.6
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
2025
2024
2023
2022
2021
January
13.5
13
18
12
20
7
February
14.4
13
17
16
14
6
March
13.9
14
12
16
12
12
April
14.1
15
15
12
14
May
12.9
12
12
16
13
11
June
0
0
0
0
0
July
12.3
13
9
14
11
August
10.7
11
12
11
11
September
12.7
13
12
13
13
October
11.7
12
11
12
12
November
11.8
14
13
11
12
December
0
0
0
0
Average
12.8
13.1
13.0
13.6
12.2
11.7
Average wind speed
Excluding wind gusts. Only observations between sunrise and sunset are taken into account.
Prevailing wind direction
Month
2025
2024
2023
2022
2021
January
103°
166°
152°
182°
116°
February
180°
169°
174°
171°
153°
March
187°
165°
184°
155°
132°
April
154°
114°
178°
154°
May
061°
067°
037°
204°
009°
June
360°
360°
360°
360°
360°
July
077°
058°
314°
177°
August
022°
031°
329°
213°
September
248°
251°
349°
118°
October
194°
172°
191°
218°
November
157°
178°
195°
174°
December
360°
360°
360°
360°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.