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
33.3
33
February
100.0
100
100
March
78.5
77
100
April
86.6
87
May
80.0
80
June
84.6
85
July
59.4
48
100
August
76.3
91
70
September
64.2
60
75
October
72.7
50
86
November
76.0
80
70
December
40.9
63
29
Average
72.3
80.0
69.8
67.1
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
-3.8
-2
February
5.2
4
6
March
9.9
10
11
April
14.0
14
May
17.3
17
June
21.6
22
July
25.1
25
25
August
26.1
26
26
September
20.7
21
21
October
14.0
12
16
November
11.3
11
12
December
4.0
8
-1
Average
14.9
9.1
16.7
19.0
Average highest temperature per day
The maximum temperature is typically observed some hours after noon.
Minimum temperatures (°C)
Month
Average
2024
2023
2022
January
-3.5
-2
February
0.6
-4
2
March
9.0
9
9
April
13.3
13
May
16.5
17
June
20.0
20
July
23.8
24
24
August
24.5
24
25
September
19.5
20
19
October
12.7
12
14
November
8.3
7
9
December
2.3
8
-4
Average
13.5
7.9
15.4
17.2
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
January
66.6
67
February
25.0
50
0
March
50.0
54
0
April
46.6
47
May
100.0
100
June
38.4
39
July
45.9
41
63
August
44.7
55
41
September
35.7
30
50
October
27.2
25
29
November
44.0
60
20
December
86.3
75
93
Average
50.5
53.3
48.2
50.0
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
January
3.6
4
February
2.2
1
4
March
6.6
7
1
April
5.3
5
May
3.6
4
June
3.6
4
July
4.1
4
4
August
3.4
4
3
September
2.1
2
2
October
5.3
6
5
November
4.4
6
3
December
4.0
4
4
Average
4.6
6.2
4.3
3.3
Average wind speed
Excluding wind gusts. Only observations between sunrise and sunset are taken into account.
Prevailing wind direction
Month
2024
2023
2022
January
327°
February
360°
018°
March
219°
360°
April
265°
May
360°
June
256°
July
197°
243°
August
271°
241°
September
188°
030°
October
225°
334°
November
255°
315°
December
264°
018°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.