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
91.1
91
86
94
93
91
February
88.1
91
89
92
94
83
March
90.5
89
90
89
96
87
April
91.9
89
94
92
94
May
94.4
98
88
97
95
96
June
93.7
94
96
96
90
95
July
93.0
96
97
94
91
August
83.7
93
87
91
90
September
92.4
97
94
91
93
October
92.2
94
90
88
95
November
91.3
92
89
94
89
December
92.1
92
89
91
93
Average
90.8
92.3
91.8
92.3
92.2
91.2
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
31.1
30.6
32.0
30.8
31.6
30.6
February
31.7
32.0
32.1
31.6
32.2
32.1
March
31.7
31.6
32.5
31.1
32.8
32.1
April
32.2
32.7
32.2
32.0
32.8
May
32.5
32.8
32.5
32.8
32.7
32.5
June
32.1
33.0
32.2
32.7
31.3
32.0
July
32.0
32.6
31.6
32.1
32.2
August
31.9
31.6
31.8
31.6
31.3
September
31.7
32.6
33.5
31.1
31.8
October
31.6
32.5
32.7
30.6
32.2
November
31.4
31.6
31.8
30.8
31.6
December
30.9
30.6
31.3
30.8
31.5
Average
31.6
32.0
32.1
32.0
31.7
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
23.7
23.8
23.5
23.3
23.6
23.6
February
23.7
23.5
24.3
23.6
23.3
23.1
March
24.0
23.5
24.5
23.5
23.5
23.6
April
23.8
24.6
23.0
22.3
22.8
May
24.5
24.6
24.1
24.0
24.1
24.1
June
23.7
24.0
24.3
23.1
23.6
23.0
July
23.5
23.5
23.5
23.8
22.3
August
23.6
24.1
23.3
23.8
22.8
September
23.8
24.1
23.5
23.3
23.6
October
23.5
23.3
23.3
23.6
23.5
November
23.7
22.3
24.1
22.8
23.8
December
23.6
22.3
22.6
23.5
23.8
Average
23.9
23.9
23.8
23.4
23.4
23.3
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2025
2024
2023
2022
2021
January
9.4
11
15
13
7
11
February
4.8
4
6
6
5
5
March
8.9
13
8
14
7
10
April
6.4
7
7
10
6
May
5.0
3
8
3
5
7
June
6.4
6
5
3
11
9
July
4.6
4
2
6
8
August
6.6
9
5
9
11
September
8.1
8
5
8
13
October
8.8
8
5
18
8
November
10.7
9
10
15
14
December
12.1
17
14
13
10
Average
7.1
7.6
8.4
7.1
9.4
9.3
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
5.0
5
5
6
5
5
February
5.2
6
5
6
5
6
March
4.7
5
5
6
6
5
April
4.6
5
5
5
5
May
4.4
5
5
5
5
4
June
4.7
5
5
5
5
5
July
5.4
6
7
5
5
August
5.3
6
6
5
5
September
5.3
6
6
6
5
October
4.8
5
5
5
5
November
4.8
5
5
6
5
December
5.1
6
5
5
6
Average
4.8
5.0
5.3
5.6
5.2
5.1
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
328°
264°
288°
318°
305°
February
314°
347°
307°
291°
325°
March
295°
341°
015°
286°
325°
April
295°
273°
222°
322°
May
133°
130°
175°
140°
091°
June
162°
134°
144°
186°
147°
July
148°
156°
136°
163°
August
147°
149°
152°
130°
September
158°
146°
138°
107°
October
177°
181°
249°
178°
November
244°
267°
262°
225°
December
286°
246°
220°
303°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.