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
95.2
92
91
94
99
91
February
98.3
98
99
96
98
100
March
96.9
93
98
96
98
97
April
96.6
97
96
97
95
May
97.7
98
96
99
98
96
June
97.3
99
96
97
98
98
July
98.3
98
97
98
97
August
97.5
99
97
98
95
September
95.7
98
98
96
99
October
96.7
98
94
99
98
November
95.6
93
96
97
94
December
96.3
98
95
97
99
Average
96.8
95.8
96.8
96.0
97.7
96.5
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
29.9
29.1
29.6
29.3
30.6
28.5
February
30.9
30.8
31.8
30.0
30.3
31.0
March
31.6
30.8
32.5
30.1
31.5
32.2
April
31.9
32.5
31.5
30.8
31.6
May
31.7
32.1
31.5
32.0
32.0
31.5
June
31.0
32.0
31.1
31.3
30.3
31.3
July
31.1
31.8
30.8
31.1
31.3
August
31.0
31.3
31.3
30.6
30.1
September
31.0
31.5
31.6
30.3
30.8
October
31.3
31.1
32.7
30.3
31.3
November
30.8
30.6
31.6
30.3
30.6
December
30.3
31.0
30.3
29.3
30.3
Average
31.0
30.9
31.3
31.0
30.6
30.9
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
24.7
24.8
24.8
24.5
24.6
24.0
February
25.0
24.8
25.8
24.3
24.8
24.5
March
25.4
25.1
26.0
24.5
25.0
25.1
April
25.8
26.8
25.6
25.1
25.1
May
26.4
25.8
26.5
26.6
26.1
26.1
June
26.0
26.3
26.0
26.1
25.1
25.6
July
26.4
27.1
26.3
26.1
26.3
August
26.2
26.3
26.3
25.8
24.8
September
25.7
26.1
26.3
25.1
25.3
October
25.7
25.8
26.5
24.8
25.6
November
25.1
25.1
25.3
24.5
25.0
December
25.1
25.3
25.5
24.5
25.5
Average
25.6
25.4
26.0
25.6
25.1
25.2
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2025
2024
2023
2022
2021
January
18.5
31
29
27
7
22
February
8.7
9
10
14
16
2
March
10.3
20
7
16
10
9
April
8.7
9
10
9
7
May
9.1
9
16
5
6
6
June
12.0
5
15
11
11
10
July
9.5
7
13
8
9
August
9.9
11
11
15
17
September
10.8
10
9
14
10
October
10.3
11
6
18
11
November
16.3
21
13
16
18
December
15.8
11
26
28
10
Average
11.9
15.1
13.0
13.4
12.5
10.8
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
7.7
9
8
7
10
9
February
9.1
10
11
9
8
12
March
7.6
8
9
9
7
8
April
5.7
7
6
6
6
May
5.8
6
6
7
7
6
June
6.0
7
6
7
6
7
July
7.0
9
7
7
7
August
7.1
8
8
7
6
September
6.8
7
8
7
7
October
5.6
7
6
5
7
November
4.9
5
5
5
5
December
6.4
7
6
5
8
Average
6.8
8.0
7.4
7.1
6.6
7.3
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
355°
358°
352°
360°
356°
February
004°
003°
357°
009°
003°
March
360°
009°
004°
010°
008°
April
053°
078°
132°
093°
May
156°
147°
162°
159°
120°
June
167°
160°
155°
176°
161°
July
155°
158°
160°
163°
August
143°
145°
162°
159°
September
159°
141°
176°
158°
October
176°
126°
208°
170°
November
278°
358°
254°
236°
December
347°
353°
354°
350°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.