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
91.5
93
91
93
90
91
February
89.4
92
87
89
91
91
March
91.7
93
92
90
94
93
April
93.4
96
95
94
90
May
91.9
94
89
92
92
94
June
92.1
92
87
93
91
July
92.4
91
94
94
93
August
93.2
89
93
93
93
September
92.3
93
84
93
92
October
86.3
95
57
94
95
November
89.5
90
83
96
92
December
90.5
89
89
94
90
Average
91.3
93.0
91.1
87.3
93.0
92.0
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
30.9
30.1
31.5
30.3
30.8
30.0
February
30.7
30.5
31.1
31.3
31.6
30.8
March
31.6
31.5
32.2
31.6
32.6
32.0
April
32.5
33.8
32.5
32.7
32.2
May
32.2
32.5
32.6
32.6
32.7
32.6
June
31.7
32.2
32.3
31.6
32.3
July
31.4
32.0
32.2
31.6
32.2
August
32.3
32.7
32.8
31.5
31.8
September
32.5
32.8
34.3
31.3
32.1
October
32.9
33.7
35.2
31.3
32.8
November
32.3
32.2
33.2
32.0
31.8
December
31.3
31.3
31.8
31.6
31.3
Average
31.8
31.1
32.4
32.5
31.8
31.8
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
23.2
23.0
22.3
19.6
24.0
24.0
February
23.9
24.1
24.5
22.1
23.6
23.8
March
23.7
24.1
24.1
21.3
24.1
23.8
April
24.3
25.1
21.6
24.1
24.1
May
24.7
24.6
24.8
22.5
24.6
24.8
June
24.1
24.0
22.1
23.1
24.3
July
24.0
23.5
22.8
24.3
24.0
August
23.9
25.1
24.5
23.8
23.8
September
24.0
25.1
23.3
24.1
24.1
October
23.8
25.1
21.1
23.8
24.8
November
23.5
24.6
21.6
23.3
24.0
December
23.9
24.6
24.1
22.8
24.3
Average
23.9
23.9
24.4
22.2
23.8
24.1
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2025
2024
2023
2022
2021
January
8.1
13
8
8
7
12
February
7.4
6
13
3
4
5
March
6.0
8
7
6
5
4
April
4.7
9
4
3
4
May
4.4
3
9
5
3
5
June
3.8
6
4
3
3
July
3.9
3
4
5
2
August
3.5
1
2
8
8
September
3.7
4
2
7
5
October
4.0
2
2
7
3
November
5.2
8
4
6
7
December
6.2
6
7
4
8
Average
5.4
7.6
6.7
4.3
5.1
5.5
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
6.8
7
6
7
6
7
February
6.4
6
6
7
6
7
March
5.5
6
5
6
5
5
April
4.3
4
4
4
5
May
4.5
4
5
4
4
5
June
4.9
4
5
5
5
July
5.8
5
6
5
6
August
6.6
7
6
5
6
September
6.3
6
8
5
6
October
5.1
4
7
4
5
November
4.4
4
4
4
4
December
5.3
6
5
4
6
Average
5.6
5.9
5.1
5.8
4.9
5.5
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
319°
316°
317°
321°
321°
February
334°
329°
325°
329°
336°
March
325°
332°
332°
323°
328°
April
098°
340°
322°
340°
May
140°
125°
144°
137°
133°
June
124°
131°
143°
144°
July
135°
125°
138°
138°
August
118°
120°
128°
131°
September
134°
120°
138°
130°
October
137°
111°
291°
146°
November
338°
303°
311°
307°
December
316°
311°
326°
316°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.