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
0.0
0
February
100.0
100
100
March
100.0
100
100
April
60.0
60
May
100.0
100
June
62.5
63
July
71.8
53
93
August
70.9
67
77
September
77.7
50
100
October
78.5
57
100
November
84.6
87
82
December
75.0
100
73
Average
82.9
100.0
63.4
85.4
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
4.0
4
February
2.2
0
5
March
8.1
8
9
April
16.8
17
May
20.6
21
June
23.6
24
July
26.8
27
27
August
26.5
28
26
September
22.1
22
22
October
17.2
16
19
November
12.8
14
12
December
1.0
3
0
Average
14.4
6.5
18.5
18.3
Average highest temperature per day
The maximum temperature is typically observed some hours after noon.
Minimum temperatures (°C)
Month
Average
2024
2023
2022
January
2.8
3
February
1.7
-1
5
March
8.0
8
9
April
16.6
17
May
20.3
20
June
22.1
22
July
25.6
26
25
August
24.9
26
24
September
21.5
22
21
October
16.5
15
18
November
11.6
13
11
December
0.6
3
0
Average
13.6
6.2
17.6
17.2
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
January
75.0
75
February
50.0
100
0
March
44.4
50
0
April
80.0
80
May
100.0
100
June
75.0
75
July
59.3
47
73
August
54.8
56
54
September
55.5
100
20
October
64.2
57
71
November
61.5
67
55
December
75.0
100
73
Average
59.6
55.5
62.1
61.2
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
2024
2023
2022
January
2.0
2
February
4.0
4
4
March
3.4
4
2
April
5.5
6
May
9.0
9
June
4.5
5
July
4.0
4
4
August
4.5
4
5
September
4.2
2
6
October
3.2
4
2
November
5.9
8
4
December
3.6
1
4
Average
4.1
3.6
4.6
4.1
Average wind speed
Excluding wind gusts. Only observations between sunrise and sunset are taken into account.
Prevailing wind direction
Month
2024
2023
2022
January
063°
February
108°
270°
March
144°
090°
April
216°
May
140°
June
163°
July
135°
219°
August
142°
185°
September
090°
180°
October
243°
236°
November
240°
201°
December
360°
250°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.