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
61.5
62
February
61.5
80
50
March
89.4
100
73
April
81.4
82
May
46.1
46
June
84.0
84
July
90.0
94
85
August
77.7
71
90
September
78.2
69
100
October
96.2
100
92
November
96.0
100
94
December
100.0
100
100
Average
88.5
96.4
78.3
90.8
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
4.9
5
February
2.7
3
3
March
9.1
7
11
April
15.9
16
May
19.5
20
June
22.7
23
July
26.3
27
25
August
25.7
26
26
September
22.6
24
21
October
16.0
17
15
November
14.8
15
15
December
6.1
9
5
Average
14.5
6.3
18.3
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
3.0
3
February
2.2
2
2
March
7.2
5
10
April
13.5
14
May
17.4
18
June
21.3
21
July
24.5
25
24
August
23.3
24
23
September
21.3
22
20
October
14.5
16
14
November
12.2
12
13
December
5.1
8
3
Average
12.7
4.3
16.5
17.2
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
January
38.4
39
February
53.8
60
50
March
26.3
35
13
April
22.2
22
May
7.6
8
June
48.0
48
July
21.6
24
19
August
42.5
49
32
September
39.1
56
0
October
29.6
40
17
November
16.0
38
6
December
0.0
0
0
Average
29.9
39.2
34.4
16.0
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
5.6
6
February
6.7
4
8
March
6.7
7
6
April
7.0
7
May
5.4
5
June
5.6
6
July
5.2
5
6
August
5.5
6
5
September
4.6
4
5
October
5.4
5
6
November
8.7
16
6
December
8.6
16
5
Average
6.1
6.7
6.2
5.5
Average wind speed
Excluding wind gusts. Only observations between sunrise and sunset are taken into account.
Prevailing wind direction
Month
2024
2023
2022
January
261°
February
315°
336°
March
276°
345°
April
002°
May
010°
June
052°
July
079°
061°
August
354°
090°
September
322°
109°
October
325°
021°
November
246°
317°
December
250°
277°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.