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
96.8
97
100
99
99
95
February
97.0
95
99
97
97
96
March
98.5
99
99
100
99
98
April
99.3
100
99
99
100
May
99.8
100
100
100
99
100
June
99.1
99
100
99
99
July
99.1
99
97
100
100
August
99.5
100
100
100
100
September
99.6
99
100
100
100
October
99.3
100
100
97
100
November
98.4
99
100
99
98
December
97.5
94
100
100
98
Average
98.5
97.5
98.9
99.2
99.0
98.6
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
30.4
29.6
31.3
31.3
30.6
29.5
February
30.7
31.0
31.3
30.3
31.0
30.3
March
31.1
31.1
31.6
31.3
31.3
31.0
April
30.9
31.1
30.5
31.1
30.8
May
30.3
30.8
30.1
30.1
31.1
30.3
June
29.4
29.6
29.5
30.1
30.0
July
28.6
29.5
28.3
28.8
29.1
August
28.7
29.5
28.6
29.1
29.0
September
29.5
30.6
29.1
29.3
29.3
October
30.6
31.3
31.5
29.8
30.5
November
31.2
32.2
31.8
30.8
30.5
December
30.7
30.0
30.8
31.5
30.8
Average
30.2
30.6
30.7
30.2
30.3
30.1
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
24.7
24.3
25.6
24.8
21.3
25.1
February
24.9
25.8
26.1
22.6
23.5
24.1
March
24.6
25.1
25.6
25.8
23.8
23.5
April
24.7
24.0
25.5
25.6
25.8
May
25.3
25.3
25.6
25.6
25.1
25.1
June
24.3
24.0
23.1
24.8
24.5
July
23.6
25.3
20.0
22.6
24.1
August
24.3
23.6
24.1
25.1
25.3
September
24.4
24.3
24.1
23.5
25.5
October
24.5
23.3
24.6
24.3
25.1
November
25.3
25.6
25.3
24.6
24.6
December
24.6
23.8
23.6
24.3
24.3
Average
24.7
25.1
24.7
24.1
24.0
24.7
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2025
2024
2023
2022
2021
January
9.6
17
2
10
6
19
February
7.0
13
2
10
5
8
March
4.5
8
4
1
4
5
April
2.3
2
5
3
1
May
0.9
1
1
0
0
0
June
1.8
2
1
1
1
July
2.0
2
7
2
0
August
1.7
0
1
2
3
September
0.6
1
0
1
1
October
1.5
0
0
8
1
November
4.8
2
1
7
10
December
8.3
21
2
3
7
Average
4.3
9.9
3.2
3.0
3.5
4.6
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
8.7
7
9
10
8
8
February
8.1
8
7
10
7
8
March
7.2
8
8
8
7
7
April
7.9
9
9
7
7
May
10.4
9
12
11
8
11
June
10.9
12
8
10
9
July
12.6
13
12
13
11
August
12.0
11
12
11
12
September
10.7
10
11
10
12
October
8.6
10
9
7
7
November
7.0
7
8
7
6
December
7.9
9
7
7
8
Average
9.3
8.1
9.7
9.6
8.5
8.8
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
269°
265°
265°
271°
275°
February
266°
264°
270°
267°
273°
March
247°
252°
241°
232°
264°
April
123°
202°
148°
125°
May
119°
119°
118°
117°
109°
June
119°
119°
120°
112°
July
119°
122°
120°
114°
August
125°
123°
123°
118°
September
133°
126°
140°
118°
October
145°
135°
189°
174°
November
160°
187°
200°
211°
December
276°
250°
221°
265°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.