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
January
49.2
38
75
35
February
62.9
61
69
59
March
71.7
77
71
68
April
64.2
62
68
63
May
78.0
79
74
81
June
0
0
0
July
0
0
0
0
August
86.2
79
92
92
79
September
87.9
87
89
87
October
60.9
62
58
64
November
61.7
60
63
63
December
0
0
0
Average
74.2
71.2
76.2
74.1
75.3
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
January
-19.8
-18
-21
-16
February
-14.8
-13
-9
-17
March
-15.2
-18
-14
-12
April
-10.4
-13
-9
-7
May
-2.3
-4
-1
-1
June
4.2
2
5
5
July
12.8
12
14
14
12
August
14.0
13
15
14
13
September
7.1
9
5
8
October
-1.9
0
2
-2
November
-11.3
-10
-8
-14
December
-14.6
-12
-8
-18
Average
-3.0
-5.3
-3.3
-3.8
-3.5
Average highest temperature per day
The maximum temperature is typically observed some hours after noon.
Minimum temperatures (°C)
Month
Average
2024
2023
2022
2021
January
-26.2
-25
-29
-24
February
-22.8
-20
-19
-24
March
-25.5
-26
-24
-23
April
-19.5
-22
-18
-16
May
-8.7
-9
-7
-6
June
-1.8
-1
0
0
July
5.0
4
5
7
4
August
6.8
6
7
7
8
September
1.4
2
0
3
October
-5.7
-4
-2
-6
November
-18.2
-17
-16
-20
December
-22.9
-19
-17
-26
Average
-10.0
-12.3
-11.8
-10.9
-9.2
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
January
70.4
75
58
78
February
62.2
54
66
67
March
42.9
31
44
54
April
43.6
42
32
58
May
29.7
36
35
19
June
0
0
0
July
0
0
0
0
August
8.8
5
6
11
17
September
18.6
19
20
16
October
37.9
47
29
38
November
50.6
64
46
42
December
0
0
0
Average
30.5
29.8
31.8
35.8
24.6
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
January
16.7
20
12
18
February
13.5
14
13
13
March
11.9
11
13
12
April
14.2
14
13
15
May
13.6
14
13
14
June
0
0
0
July
0
0
0
0
August
11.0
11
10
12
11
September
12.4
11
12
15
October
12.2
13
11
14
November
12.5
13
14
11
December
0
0
0
Average
12.6
12.3
12.2
12.9
12.8
Average wind speed
Excluding wind gusts. Only observations between sunrise and sunset are taken into account.
Prevailing wind direction
Month
2024
2023
2022
2021
January
174°
141°
198°
February
191°
200°
173°
March
276°
229°
224°
April
008°
352°
253°
May
039°
090°
232°
June
360°
360°
360°
July
360°
360°
360°
360°
August
027°
078°
278°
285°
September
246°
012°
104°
October
115°
206°
305°
November
186°
278°
250°
December
360°
360°
360°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.