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
91.8
94
90
91
86
94
February
90.6
95
90
91
93
92
March
92.7
93
89
93
95
95
April
90.7
91
89
91
96
May
88.6
87
93
85
93
88
June
87.9
87
91
88
84
86
July
88.1
79
89
94
94
August
87.0
92
88
93
89
September
88.1
88
92
82
89
October
85.9
87
79
88
79
November
89.3
88
91
91
90
December
92.9
91
97
94
94
Average
89.7
91.4
89.0
89.4
90.2
90.4
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
28.6
28.8
28.6
27.3
27.8
29.5
February
28.5
30.8
29.6
28.3
28.3
28.0
March
28.5
29.3
28.6
28.8
29.1
29.1
April
25.9
28.6
24.8
26.1
24.3
May
24.1
24.3
26.6
24.0
22.5
23.8
June
23.1
22.3
25.8
22.8
22.0
21.8
July
23.3
23.3
23.3
24.8
22.1
August
23.7
26.0
25.5
23.1
23.8
September
27.1
29.5
29.5
22.3
28.1
October
26.5
27.5
27.0
26.5
23.6
November
26.5
27.1
29.3
24.8
26.1
December
28.1
28.5
30.3
27.0
26.3
Average
26.2
27.1
27.4
26.7
25.3
25.5
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
19.2
19.6
19.3
18.5
19.3
20.0
February
19.0
19.6
19.1
19.5
18.8
18.5
March
18.8
19.1
19.8
18.5
19.6
18.8
April
16.6
18.3
16.3
17.0
15.6
May
14.3
14.5
16.3
14.5
13.4
13.5
June
13.0
12.9
13.3
12.0
12.5
13.3
July
11.6
12.5
13.0
12.6
8.8
August
12.4
11.4
14.3
12.5
12.9
September
15.2
16.0
16.6
12.9
15.6
October
16.9
17.1
17.8
16.6
15.8
November
16.8
17.8
18.6
15.0
16.3
December
18.3
19.3
19.1
17.6
17.3
Average
16.1
17.1
16.6
16.5
15.6
15.5
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2025
2024
2023
2022
2021
January
8.4
7
8
11
15
5
February
8.7
6
6
8
5
8
March
4.8
2
11
3
5
3
April
4.7
1
9
3
4
May
3.8
2
4
5
4
3
June
4.5
6
2
7
1
5
July
2.7
9
2
1
2
August
6.8
4
5
4
5
September
5.5
3
3
14
3
October
8.5
6
7
6
16
November
8.4
14
7
7
9
December
8.0
13
2
14
9
Average
6.2
4.6
7.0
5.8
6.4
6.0
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
6.1
7
7
6
6
6
February
6.0
6
6
7
6
6
March
5.9
6
6
6
6
6
April
6.0
6
6
7
6
May
6.3
7
7
5
7
6
June
6.1
7
6
6
6
6
July
6.1
5
7
7
6
August
6.6
7
7
8
7
September
6.5
6
7
7
7
October
6.5
7
7
7
7
November
6.7
7
7
7
7
December
6.4
7
7
6
6
Average
6.3
6.5
6.4
6.5
6.6
6.4
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
012°
230°
352°
001°
021°
February
047°
083°
321°
093°
062°
March
107°
106°
053°
012°
020°
April
058°
078°
091°
119°
May
064°
360°
081°
002°
023°
June
041°
025°
023°
056°
082°
July
080°
055°
042°
067°
August
065°
063°
077°
092°
September
092°
055°
109°
105°
October
112°
061°
083°
101°
November
095°
018°
120°
120°
December
014°
114°
072°
125°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.