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
99.9
100
100
99
100
100
February
99.1
99
100
99
99
100
March
99.3
100
98
99
99
100
April
99.8
100
99
100
100
May
99.7
100
99
100
100
June
99.9
100
100
100
100
July
99.9
100
100
100
100
August
99.4
98
99
100
100
September
99.6
100
100
99
99
October
99.5
100
99
99
99
November
99.3
99
100
99
98
December
99.3
98
100
97
100
Average
99.5
99.7
99.4
99.5
99.3
99.7
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
29.4
29.5
29.8
30.1
29.3
29.0
February
29.4
30.1
29.8
29.3
29.1
29.1
March
29.3
29.6
29.3
29.1
29.5
29.3
April
28.8
29.5
29.1
29.1
28.6
May
27.5
28.1
27.6
27.6
27.5
June
26.6
26.8
25.8
27.8
26.3
July
26.0
26.0
24.8
27.3
26.6
August
25.7
25.3
24.8
27.1
25.0
September
26.4
26.1
26.5
27.6
26.6
October
27.0
27.3
26.3
27.0
27.1
November
27.8
27.1
28.3
28.3
28.3
December
28.9
29.3
29.6
29.1
29.1
Average
27.9
29.6
27.9
27.6
28.2
27.7
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
25.2
24.8
26.3
25.1
26.1
25.3
February
25.4
25.0
26.3
25.3
25.1
25.3
March
25.0
23.8
25.0
25.8
24.0
25.1
April
24.7
25.1
24.6
25.1
24.0
May
23.9
25.1
23.3
24.1
24.3
June
23.0
23.6
21.1
24.3
22.1
July
22.3
22.5
20.6
23.1
22.8
August
21.9
21.1
21.8
23.1
21.3
September
22.0
22.5
22.6
22.6
22.6
October
22.9
23.1
22.6
22.5
22.5
November
23.8
24.0
24.8
24.8
23.6
December
24.7
25.8
24.5
25.3
25.0
Average
23.8
24.6
24.2
23.5
24.1
23.6
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2025
2024
2023
2022
2021
January
7.7
8
12
5
11
10
February
8.4
7
6
16
7
8
March
9.4
16
25
7
13
3
April
5.1
4
6
4
4
May
5.9
12
6
1
7
June
5.0
1
8
0
7
July
6.4
4
14
1
5
August
6.9
5
16
3
8
September
5.0
9
3
3
7
October
4.6
6
4
7
1
November
5.9
6
9
5
3
December
6.7
5
5
6
4
Average
6.8
10.6
7.9
8.0
4.7
5.5
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
7
9
5
8
6
February
8.1
7
10
8
8
7
March
6.6
7
9
7
5
5
April
8.2
10
10
7
5
May
8.9
10
8
8
11
June
8.2
10
7
9
7
July
9.4
10
9
13
9
August
9.0
9
11
10
9
September
9.4
9
13
10
9
October
9.9
9
12
9
11
November
8.6
12
10
8
8
December
9.1
9
12
7
8
Average
8.4
6.9
9.6
9.3
8.4
7.8
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
089°
083°
020°
009°
009°
February
071°
098°
349°
057°
054°
March
089°
076°
100°
321°
085°
April
101°
092°
085°
107°
May
106°
087°
104°
100°
June
095°
126°
097°
103°
July
101°
122°
093°
094°
August
099°
109°
089°
118°
September
105°
099°
088°
095°
October
086°
106°
082°
093°
November
095°
086°
082°
092°
December
076°
099°
058°
085°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.