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
97.1
100
96
96
98
94
February
98.3
100
100
96
97
97
March
99.0
100
100
97
99
April
98.6
99
100
98
100
May
99.2
99
100
100
99
June
98.9
98
100
98
99
July
97.7
99
98
94
99
August
99.4
100
99
99
100
September
98.3
100
99
98
95
October
98.6
100
100
98
96
November
99.1
100
99
97
99
December
98.5
98
99
100
100
Average
98.7
99.7
99.0
98.6
97.5
98.3
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
26.9
26.5
26.3
26.8
27.5
26.3
February
27.4
28.6
27.1
28.3
25.8
26.5
March
26.3
27.5
25.3
27.1
27.0
April
25.5
26.1
25.6
26.1
26.0
May
25.4
26.8
26.5
25.3
25.3
June
25.2
26.5
25.8
25.3
26.0
July
25.5
26.0
26.3
26.1
26.0
August
26.1
26.6
26.8
25.8
26.5
September
26.1
27.5
26.0
26.0
26.0
October
26.4
26.0
27.3
26.8
26.6
November
26.0
26.6
25.8
25.5
26.8
December
26.2
26.5
26.3
25.5
26.8
Average
26.2
27.5
26.6
26.4
26.1
26.3
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
19.0
20.8
19.8
19.1
19.3
19.3
February
19.8
22.0
21.1
19.8
20.5
20.3
March
19.9
21.8
19.5
18.6
19.5
April
19.8
20.6
19.1
20.1
18.6
May
20.4
21.6
21.5
20.5
19.6
June
20.0
21.3
20.5
18.0
20.3
July
19.1
20.1
20.3
17.3
19.6
August
18.8
20.0
20.3
18.0
19.1
September
18.4
19.8
19.8
17.8
19.1
October
19.0
20.1
20.8
18.3
18.8
November
18.8
19.6
19.8
19.3
20.0
December
19.1
20.0
20.3
18.8
18.3
Average
19.5
21.3
20.5
20.0
18.9
19.3
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2025
2024
2023
2022
2021
January
3.0
2
5
1
6
3
February
2.9
1
7
0
2
2
March
4.8
3
8
3
2
April
8.8
12
6
7
5
May
7.9
8
5
7
7
June
5.0
5
5
3
4
July
2.8
3
3
1
4
August
3.4
2
6
3
2
September
4.7
2
10
4
6
October
4.2
4
4
3
5
November
7.3
12
9
7
4
December
5.4
6
3
6
5
Average
4.5
1.3
5.5
4.8
4.3
4.0
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
7.3
7
6
7
8
8
February
7.9
9
7
8
9
9
March
7.8
7
7
9
9
April
8.2
8
8
10
10
May
8.3
9
9
9
8
June
8.5
10
7
10
9
July
8.8
6
9
10
10
August
7.5
7
8
8
7
September
7.6
7
7
8
7
October
7.0
7
8
7
6
November
6.7
6
7
6
7
December
6.4
6
5
6
7
Average
7.6
8.0
7.2
7.6
8.2
8.2
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
197°
223°
164°
144°
177°
February
181°
183°
187°
192°
174°
March
183°
193°
188°
180°
April
193°
188°
192°
182°
May
178°
182°
195°
182°
June
175°
185°
176°
174°
July
182°
169°
169°
170°
August
179°
164°
153°
156°
September
166°
170°
180°
166°
October
202°
178°
153°
176°
November
212°
211°
200°
168°
December
185°
209°
194°
189°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.