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
2025
2024
2023
2022
2021
January
88.0
75
84
86
89
86
February
97.3
94
98
96
98
97
March
95.8
96
97
99
89
92
April
95.3
92
97
89
94
May
95.2
88
92
98
90
91
June
92.3
87
98
95
85
July
74.5
45
53
70
69
August
82.1
51
88
82
91
September
88.1
78
95
85
82
October
77.7
64
69
85
82
November
82.8
57
77
82
75
December
82.4
63
66
79
75
Average
88.0
88.5
75.5
85.3
86.1
84.8
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
2025
2024
2023
2022
2021
January
29.3
30.3
30.3
29.0
27.0
28.8
February
31.8
33.5
33.7
32.1
30.1
28.3
March
34.2
35.7
35.5
33.5
32.5
33.1
April
35.6
37.1
35.2
34.1
34.0
May
33.9
31.1
34.8
35.1
31.3
30.6
June
28.8
29.1
31.6
28.1
27.0
July
25.9
25.8
25.6
25.3
25.5
August
26.5
27.6
28.3
25.6
26.3
September
27.9
28.3
28.1
27.0
27.3
October
29.2
30.0
30.3
27.6
29.0
November
29.1
29.3
29.6
28.5
27.3
December
28.7
30.5
29.1
28.0
27.1
Average
30.3
32.6
30.9
30.6
28.8
28.7
Average highest temperature per day
The maximum temperature is typically observed some hours after noon.
Minimum temperatures (°C)
Month
Average
2025
2024
2023
2022
2021
January
15.0
16.5
16.6
12.9
13.5
15.9
February
16.1
17.3
16.6
15.6
14.6
14.0
March
18.8
19.6
20.0
18.3
19.0
18.1
April
21.2
22.8
20.6
21.0
19.8
May
21.8
22.1
22.6
21.0
20.8
21.8
June
21.5
21.8
22.5
21.1
19.6
July
20.8
22.1
18.3
21.0
20.3
August
20.3
22.3
21.5
14.8
20.5
September
19.9
21.6
19.3
16.5
20.8
October
20.0
21.3
21.1
16.6
20.0
November
18.3
18.1
20.1
16.8
19.3
December
16.8
17.6
18.6
16.8
15.5
Average
19.2
18.9
20.3
19.1
17.7
18.8
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2025
2024
2023
2022
2021
January
0.0
0
0
0
0
0
February
0.2
0
0
0
0
1
March
0.1
0
0
0
0
0
April
0.0
0
0
0
0
May
2.4
8
1
0
5
5
June
11.7
12
4
9
15
July
34.0
48
45
40
36
August
21.5
30
12
25
10
September
11.1
10
7
12
12
October
4.3
6
3
2
2
November
1.0
0
1
0
3
December
1.1
1
0
4
1
Average
7.0
2.0
9.5
6.3
8.7
7.4
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
2025
2024
2023
2022
2021
January
5.8
6
6
5
7
6
February
6.0
6
6
6
5
7
March
6.0
6
6
7
6
6
April
5.4
6
6
5
6
May
6.6
8
8
6
5
8
June
8.7
10
11
5
10
July
9.3
12
11
5
11
August
8.9
9
10
8
9
September
7.5
9
10
8
10
October
5.3
5
7
5
6
November
6.7
6
8
7
7
December
6.6
6
7
7
6
Average
6.9
6.6
7.4
8.0
6.1
7.7
Average wind speed
Excluding wind gusts. Only observations between sunrise and sunset are taken into account.
Prevailing wind direction
Month
2025
2024
2023
2022
2021
January
106°
127°
125°
151°
118°
February
096°
133°
080°
122°
109°
March
070°
312°
147°
079°
101°
April
318°
293°
300°
348°
May
274°
291°
289°
290°
258°
June
266°
266°
264°
272°
July
271°
273°
279°
276°
August
271°
279°
279°
277°
September
277°
272°
269°
271°
October
084°
062°
032°
054°
November
080°
099°
076°
090°
December
093°
096°
087°
118°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.