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
3.6
0
1
2
4
0
February
8.8
1
2
5
8
4
March
20.4
2
3
21
7
8
April
33.5
5
25
22
27
May
45.3
10
12
47
34
39
June
23.4
6
24
32
15
July
4.4
0
0
2
7
August
8.7
4
2
9
10
September
13.9
3
2
11
6
October
9.9
0
2
15
18
November
5.5
0
0
0
3
December
2.7
1
0
1
0
Average
14.8
3.6
3.2
11.1
12.9
11.9
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
2025
2024
2023
2022
2021
January
30.5
31.6
31.1
29.3
28.8
30.6
February
32.4
33.5
32.2
34.1
30.1
32.6
March
33.2
33.7
32.6
33.2
34.6
34.8
April
33.5
34.3
33.6
34.0
33.1
May
33.0
32.0
33.5
33.0
32.8
33.1
June
31.9
32.2
32.8
31.6
31.1
July
29.8
29.1
29.1
29.5
30.5
August
29.8
30.0
30.3
29.6
29.6
September
30.4
29.8
30.6
29.8
29.8
October
33.2
32.5
34.5
32.1
33.3
November
33.6
33.2
34.2
33.2
33.8
December
31.4
31.0
32.7
33.1
30.3
Average
32.0
32.7
31.8
32.3
31.6
31.9
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
21.9
23.1
23.1
21.1
21.1
22.6
February
23.5
24.3
23.8
23.6
21.6
23.6
March
25.5
25.8
25.3
25.8
26.3
26.1
April
27.5
27.8
27.3
28.0
27.6
May
28.5
26.5
29.0
29.0
29.3
28.5
June
27.1
27.1
28.6
27.1
26.1
July
26.0
25.6
26.0
25.3
25.8
August
26.3
26.5
27.0
26.1
26.1
September
25.8
25.5
26.3
25.6
26.0
October
26.6
26.3
27.6
25.5
26.6
November
25.3
25.3
26.5
23.6
26.1
December
23.4
23.3
24.8
25.3
22.6
Average
25.6
24.9
25.7
26.1
25.4
25.6
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2025
2024
2023
2022
2021
January
0.1
0
0
0
1
0
February
0.0
0
0
0
0
0
March
0.1
0
0
1
0
0
April
0.0
0
1
0
0
May
1.0
5
0
0
0
4
June
18.4
19
18
15
17
July
41.4
53
57
43
30
August
25.8
24
13
28
22
September
17.2
17
19
19
22
October
1.9
2
0
4
0
November
0.1
0
0
0
0
December
1.3
0
0
0
4
Average
8.6
1.3
10.3
9.6
10.1
8.7
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
2025
2024
2023
2022
2021
January
6.0
5
6
6
6
6
February
6.6
6
7
7
7
7
March
7.2
6
8
7
7
7
April
7.6
8
8
8
8
May
8.1
6
8
8
9
8
June
8.3
7
9
8
8
July
9.1
9
9
9
9
August
9.2
9
10
9
8
September
7.2
7
7
7
8
October
6.3
5
7
7
7
November
6.1
5
6
6
7
December
5.8
5
6
6
6
Average
7.2
5.7
7.0
7.5
7.3
7.2
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
290°
305°
302°
300°
286°
February
303°
302°
300°
285°
299°
March
293°
287°
273°
279°
291°
April
292°
280°
262°
273°
May
270°
264°
268°
257°
262°
June
231°
229°
215°
232°
July
232°
247°
248°
249°
August
246°
253°
243°
252°
September
260°
259°
251°
236°
October
265°
287°
301°
300°
November
065°
077°
035°
072°
December
333°
044°
316°
325°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.