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
98.7
97
100
100
100
94
February
99.5
99
100
99
100
100
March
99.0
97
99
100
100
100
April
99.6
99
100
100
100
May
99.2
97
99
100
99
100
June
99.0
98
99
100
100
99
July
99.4
100
99
99
98
August
99.6
99
99
100
100
September
99.5
100
100
100
100
October
99.4
99
99
100
100
November
99.5
99
100
100
99
December
98.8
99
98
99
100
Average
99.2
97.6
99.2
99.4
99.8
99.0
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
32.4
33.2
31.6
32.3
31.6
33.7
February
31.8
32.2
32.1
31.6
32.0
31.3
March
32.2
32.3
31.8
32.7
33.5
32.0
April
32.3
32.7
32.2
32.3
32.1
May
32.9
32.5
31.6
33.2
33.2
34.2
June
32.3
31.8
31.6
32.2
33.7
32.2
July
32.0
31.3
32.7
32.6
31.8
August
32.5
32.3
32.7
33.3
33.0
September
33.0
33.0
33.0
34.0
33.7
October
33.2
32.6
33.8
34.3
33.3
November
32.8
33.3
33.5
33.7
33.2
December
32.2
32.2
31.8
31.6
32.5
Average
32.5
32.4
32.2
32.6
33.0
32.7
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
23.8
23.6
24.6
24.3
24.1
24.3
February
24.0
24.3
24.3
24.3
23.1
23.8
March
23.9
24.6
24.6
24.1
24.1
23.6
April
24.0
24.5
24.3
24.1
23.8
May
24.4
24.1
24.6
24.6
24.5
24.6
June
23.7
24.1
24.1
24.1
23.8
23.8
July
23.5
23.8
24.6
24.0
23.1
August
23.6
24.3
24.3
24.0
23.8
September
24.2
25.0
24.6
24.0
24.3
October
24.2
24.1
23.8
24.8
24.6
November
24.1
24.8
24.8
24.3
24.6
December
24.2
24.8
24.5
24.3
24.6
Average
24.0
24.2
24.4
24.3
24.1
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
7.3
6
9
7
10
4
February
8.6
3
5
15
8
19
March
7.5
9
7
5
7
9
April
7.2
7
9
7
10
May
6.8
3
13
9
3
9
June
6.0
6
6
8
2
12
July
8.2
7
8
6
9
August
7.0
4
9
7
5
September
4.1
3
7
1
4
October
5.3
9
5
3
4
November
6.8
6
2
6
5
December
9.0
6
8
17
7
Average
6.9
5.4
6.6
7.4
6.0
7.9
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
6.9
4
5
6
8
6
February
7.2
5
5
7
6
7
March
7.0
5
5
7
6
7
April
6.2
5
6
6
6
May
5.4
5
5
6
6
5
June
5.5
5
5
5
7
6
July
5.3
5
5
6
5
August
6.1
7
6
6
6
September
6.2
6
5
7
6
October
5.9
6
6
7
6
November
6.0
6
7
6
5
December
6.4
5
5
6
8
Average
6.1
4.8
5.5
5.9
6.4
6.0
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
120°
243°
249°
274°
229°
February
228°
253°
272°
269°
272°
March
106°
235°
261°
202°
266°
April
113°
238°
181°
255°
May
110°
110°
213°
145°
141°
June
103°
105°
145°
129°
134°
July
103°
142°
136°
143°
August
102°
141°
129°
135°
September
103°
140°
131°
132°
October
102°
200°
133°
136°
November
103°
234°
227°
141°
December
241°
248°
269°
275°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.