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
2024
2023
2022
2021
2020
January
79.2
78
82
74
76
76
February
81.8
81
81
90
88
76
March
79.8
79
82
73
85
89
April
80.8
80
74
73
90
92
May
74.7
72
74
81
81
89
June
77.3
90
71
77
65
81
July
80.0
63
72
87
83
85
August
73.8
64
72
74
75
September
73.9
81
62
77
80
October
66.9
51
68
59
75
November
79.8
78
80
77
81
December
81.1
86
80
77
80
Average
77.5
77.5
74.8
75.9
77.5
81.2
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
2024
2023
2022
2021
2020
January
26.4
26
26
27
25
26
February
26.0
27
26
28
26
25
March
25.6
27
26
26
26
26
April
23.0
25
22
22
21
24
May
21.1
23
22
20
21
21
June
20.0
23
20
19
18
21
July
20.1
19
19
23
19
20
August
20.1
21
19
21
21
September
22.6
25
18
23
25
October
22.4
22
23
19
24
November
23.5
25
22
24
24
December
25.9
27
25
25
26
Average
23.1
24.2
23.3
22.3
22.3
23.4
Average highest temperature per day
The maximum temperature is typically observed some hours after noon.
Minimum temperatures (°C)
Month
Average
2024
2023
2022
2021
2020
January
17.0
17
17
17
17
18
February
16.6
17
17
17
16
17
March
16.6
18
17
18
17
15
April
14.1
16
14
14
14
13
May
11.6
14
12
10
11
10
June
10.1
12
10
10
10
12
July
8.8
9
10
10
6
10
August
9.9
11
10
11
10
September
12.2
14
10
13
13
October
13.4
14
14
13
14
November
14.0
15
13
15
14
December
16.1
17
16
16
17
Average
13.4
14.6
13.9
13.0
13.1
13.3
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
7.6
8
6
11
14
5
February
6.8
6
7
2
7
10
March
5.0
2
4
8
4
3
April
5.3
8
10
5
1
1
May
7.5
11
4
6
3
3
June
7.1
2
10
10
10
7
July
4.2
14
6
2
3
3
August
7.4
7
11
9
13
September
5.6
5
13
3
3
October
10.8
13
10
17
7
November
7.1
6
16
7
6
December
5.7
3
3
7
8
Average
6.7
7.2
6.6
8.4
7.1
5.7
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
2024
2023
2022
2021
2020
January
7.3
8
7
7
8
8
February
6.8
7
8
6
7
7
March
6.6
7
7
7
6
7
April
6.4
6
7
6
7
7
May
6.4
8
5
7
6
7
June
6.7
7
7
7
6
8
July
6.8
6
7
7
7
8
August
7.1
7
7
7
6
September
7.4
8
8
7
8
October
7.3
7
7
7
8
November
7.7
8
8
7
7
December
7.1
7
7
7
7
Average
7.0
6.9
6.9
7.0
6.8
7.1
Average wind speed
Excluding wind gusts. Only observations between sunrise and sunset are taken into account.
Prevailing wind direction
Month
2024
2023
2022
2021
2020
January
119°
097°
121°
068°
114°
February
096°
304°
085°
124°
099°
March
111°
074°
065°
017°
102°
April
054°
112°
069°
111°
071°
May
338°
056°
321°
338°
303°
June
325°
328°
333°
024°
355°
July
050°
013°
332°
331°
337°
August
348°
067°
056°
041°
September
014°
095°
071°
044°
October
072°
045°
096°
093°
November
031°
118°
109°
093°
December
100°
083°
105°
078°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.