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
65.6
66
February
50.9
51
March
71.0
71
April
83.0
83
May
93.4
94
June
94.5
95
July
92.9
92
95
August
86.8
96
78
September
90.0
92
86
95
October
75.4
82
74
69
November
55.1
55
55
December
47.2
48
47
Average
78.6
81.6
76.5
77.6
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
2024
2023
2022
January
-1.9
-1.9
February
3.5
3.5
March
7.0
7.0
April
9.7
9.8
May
20.5
20.5
June
18.9
18.8
July
19.9
20.3
19.5
August
19.8
21.1
18.6
September
18.2
18.8
19.3
13.5
October
11.4
12.0
10.0
12.4
November
4.6
5.9
3.2
December
2.9
4.5
1.3
Average
12.1
11.9
11.8
12.7
Average highest temperature per day
The maximum temperature is typically observed some hours after noon.
Minimum temperatures (°C)
Month
Average
2024
2023
2022
January
-8.7
-8.7
February
-1.0
-1.0
March
-1.3
-1.4
April
0.5
0.5
May
7.1
7.2
June
7.6
7.7
July
9.9
9.9
9.9
August
9.6
8.5
10.8
September
7.0
6.0
9.5
3.5
October
4.3
4.5
2.6
5.9
November
-1.0
-1.4
-2.6
December
-2.1
-2.9
-3.3
Average
4.2
2.8
4.6
5.1
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
January
24.3
24
February
23.0
23
March
15.9
16
April
14.6
15
May
3.3
3
June
14.9
15
July
13.9
14
14
August
15.3
10
20
September
9.6
10
7
18
October
16.0
12
22
13
November
22.3
14
31
December
29.0
24
34
Average
15.8
13.8
19.2
14.3
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
6.9
7
February
6.6
7
March
6.7
7
April
7.3
7
May
6.5
7
June
6.3
6
July
6.2
6
7
August
5.6
6
6
September
5.2
5
6
5
October
6.8
6
8
6
November
5.4
6
5
December
6.1
6
7
Average
6.1
6.1
6.3
5.9
Average wind speed
Excluding wind gusts. Only observations between sunrise and sunset are taken into account.
Prevailing wind direction
Month
2024
2023
2022
January
212°
February
200°
March
107°
April
235°
May
095°
June
219°
July
225°
222°
August
217°
222°
September
131°
206°
099°
October
201°
257°
218°
November
236°
073°
December
221°
232°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.