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
2020
January
43.2
9
67
55
0
February
79.1
84
86
68
0
0
March
83.5
84
77
91
0
0
April
91.8
89
94
93
50
0
May
93.3
96
96
88
100
June
89.7
94
92
83
100
67
July
74.3
85
77
62
100
0
August
79.1
70
85
83
100
20
September
80.7
85
80
78
0
67
October
82.2
83
78
83
88
100
November
59.4
56
75
44
0
December
49.6
48
51
51
0
Average
69.3
79.3
79.1
77.1
58.0
52.9
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
2020
January
15.6
17
16
15
9
February
19.5
19
22
19
5
4
March
25.0
24
25
28
0
11
April
30.3
29
30
35
19
12
May
35.2
38
35
38
24
June
36.2
40
36
39
33
24
July
33.3
36
34
32
33
17
August
32.3
32
35
34
26
27
September
32.0
34
34
33
24
25
October
28.4
31
29
29
27
24
November
22.8
24
23
24
9
December
19.2
21
21
19
5
Average
25.7
29.8
28.3
29.0
23.1
19.7
Average highest temperature per day
The maximum temperature is typically observed some hours after noon.
Minimum temperatures (°C)
Month
Average
2024
2023
2022
2021
2020
January
5.2
4
4
6
9
February
6.7
5
8
7
5
4
March
12.1
10
12
14
0
11
April
15.7
13
15
19
19
12
May
20.8
20
19
22
24
June
24.1
25
22
23
32
24
July
24.6
24
24
24
33
17
August
24.4
24
24
24
25
25
September
22.8
22
22
22
24
25
October
16.4
17
15
15
16
24
November
10.2
11
10
9
9
December
6.1
6
7
5
5
Average
18.3
16.5
15.2
16.2
14.0
19.4
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
7.0
1
4
16
0
February
3.2
2
4
4
0
0
March
3.2
5
4
1
0
100
April
1.8
4
1
0
50
0
May
0.3
0
1
0
0
June
1.6
1
3
1
0
0
July
1.6
0
2
3
0
0
August
2.6
5
0
3
0
0
September
0.4
1
0
0
0
33
October
0.2
0
1
0
0
0
November
0.5
0
2
0
0
December
0.2
0
0
1
0
Average
5.5
1.7
1.6
2.3
0.4
11.7
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
2020
January
7.6
5
10
8
6
February
8.8
8
10
9
0
0
March
8.6
8
8
10
0
6
April
8.2
9
7
8
16
0
May
9.2
10
9
9
5
June
8.1
9
7
9
7
6
July
8.5
9
8
8
9
0
August
7.3
8
6
7
0
9
September
6.2
6
6
6
4
8
October
6.8
7
6
7
7
5
November
6.4
6
7
6
0
December
6.8
7
7
7
0
Average
7.3
8.1
7.5
8.0
6.7
6.9
Average wind speed
Excluding wind gusts. Only observations between sunrise and sunset are taken into account.
Prevailing wind direction
Month
2024
2023
2022
2021
2020
January
271°
291°
288°
180°
February
291°
292°
298°
360°
360°
March
292°
302°
300°
360°
126°
April
298°
302°
298°
331°
360°
May
309°
352°
075°
090°
June
278°
134°
250°
080°
118°
July
119°
120°
116°
141°
360°
August
110°
131°
304°
360°
142°
September
277°
107°
124°
090°
299°
October
307°
292°
306°
307°
315°
November
277°
288°
292°
360°
December
277°
277°
288°
360°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.