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
98.9
97
98
99
100
100
February
99.3
99
99
99
100
March
99.5
100
100
100
100
April
99.4
97
100
100
100
May
99.2
99
99
100
100
June
99.3
99
99
100
100
July
98.6
100
99
99
94
August
98.6
96
99
99
100
September
99.4
100
99
98
99
October
99.0
98
98
98
99
November
98.9
98
98
99
100
December
99.3
99
97
100
100
Average
98.9
96.7
98.4
98.8
99.2
99.2
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
28.0
28.1
28.6
27.6
28.1
27.6
February
27.8
28.1
27.6
27.6
28.0
March
27.9
28.6
28.3
28.3
28.0
April
26.4
29.1
28.5
28.6
28.3
May
25.8
30.3
30.1
30.1
29.1
June
26.8
31.3
31.3
31.0
30.6
July
27.2
31.8
31.6
30.6
31.3
August
27.2
31.0
31.6
30.6
31.1
September
29.4
31.6
31.6
30.3
31.1
October
30.5
31.3
31.1
29.6
31.1
November
29.5
29.6
29.6
29.0
30.1
December
28.6
29.1
28.3
27.8
28.5
Average
27.9
28.1
30.0
29.8
29.4
29.6
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
20.8
21.5
21.8
20.6
20.3
20.6
February
20.8
21.1
21.0
21.0
20.6
March
21.0
21.5
20.6
21.1
21.3
April
20.0
23.3
21.6
21.8
21.5
May
20.3
23.1
23.8
23.6
22.8
June
21.1
25.1
24.8
24.0
23.8
July
21.4
25.6
25.3
24.5
24.6
August
21.3
24.8
25.1
24.0
24.6
September
22.7
24.8
25.1
24.0
23.1
October
23.5
24.1
24.5
23.0
23.5
November
22.7
23.3
23.5
22.6
22.6
December
21.6
21.8
22.0
21.0
22.1
Average
21.4
21.4
23.4
23.2
22.6
22.6
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2025
2024
2023
2022
2021
January
2.9
5
5
4
0
2
February
3.2
4
1
7
3
March
2.5
2
0
1
2
April
2.7
5
4
3
2
May
3.4
5
3
1
4
June
2.1
2
3
1
2
July
2.4
2
2
2
3
August
2.7
3
4
1
3
September
2.4
1
1
7
1
October
2.9
3
4
6
1
November
4.1
7
3
4
3
December
2.9
2
6
2
3
Average
3.1
5.3
3.4
2.8
2.8
2.3
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
10.4
10
11
11
9
11
February
11.7
8
13
12
13
March
10.5
10
11
12
12
April
10.0
11
9
11
9
May
8.5
7
6
10
10
June
9.7
8
8
11
11
July
11.7
12
12
13
13
August
10.3
10
9
10
12
September
7.7
8
8
8
8
October
6.9
6
6
7
7
November
7.8
6
8
8
9
December
9.8
9
10
9
11
Average
9.7
10.2
8.7
9.2
10.2
10.3
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
073°
081°
080°
083°
084°
February
070°
083°
087°
089°
March
065°
072°
086°
081°
April
071°
068°
084°
075°
May
069°
052°
081°
083°
June
076°
073°
079°
089°
July
080°
078°
088°
088°
August
083°
082°
085°
084°
September
076°
072°
082°
078°
October
068°
060°
087°
078°
November
075°
083°
090°
082°
December
076°
077°
068°
089°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.