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
86.4
100
100
63
75
80
February
86.5
100
95
79
25
83
March
93.2
91
91
100
86
83
April
84.4
100
100
44
50
May
81.8
72
78
80
100
June
56.6
40
60
100
50
July
89.1
88
100
67
83
August
88.6
86
92
67
67
September
79.2
67
100
63
100
October
95.4
98
100
75
71
November
97.8
100
98
100
100
December
89.8
95
94
67
Average
88.5
96.8
87.0
88.8
66.1
79.2
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
26.2
25
28
27
27
24
February
24.1
24
23
26
24
24
March
22.5
25
19
24
23
26
April
18.9
21
14
25
18
May
15.7
14
15
18
21
June
13.5
11
13
15
20
July
14.3
13
14
15
17
August
12.1
11
12
16
12
September
15.6
14
17
15
16
October
21.8
21
24
20
22
November
22.0
24
21
17
23
December
20.3
22
20
18
Average
20.1
24.4
19.3
20.5
20.0
20.3
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
23.8
23
26
24
27
24
February
22.0
22
21
23
23
24
March
21.0
23
16
22
23
26
April
18.6
20
14
25
18
May
15.3
13
15
18
21
June
12.8
10
12
15
20
July
13.8
12
13
15
17
August
11.5
11
10
16
12
September
13.6
11
15
14
13
October
19.7
18
22
19
21
November
19.8
22
17
17
20
December
17.7
19
17
18
Average
19.1
22.3
17.2
18.1
19.6
19.8
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
0.0
0
0
0
0
0
February
0.7
0
3
0
0
0
March
1.6
6
0
0
0
0
April
0.0
0
0
0
0
May
9.0
17
11
0
0
June
35.8
53
30
0
0
July
5.4
6
0
0
0
August
5.6
14
8
0
0
September
6.4
13
0
0
0
October
0.0
0
0
0
0
November
0.0
0
0
0
0
December
1.1
0
3
0
Average
1.7
2.0
7.4
2.1
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
7.1
7
7
8
7
6
February
6.4
7
6
6
7
8
March
6.8
7
6
8
6
7
April
7.2
8
8
5
7
May
7.2
8
8
5
8
June
10.6
11
10
15
12
July
8.3
8
7
13
8
August
8.2
8
9
9
8
September
8.8
10
6
11
6
October
7.1
8
6
10
4
November
6.4
8
5
9
7
December
6.1
7
5
4
Average
7.2
7.0
7.7
6.8
8.0
6.8
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
066°
081°
064°
018°
113°
February
081°
286°
110°
107°
111°
March
076°
049°
058°
338°
090°
April
023°
109°
036°
051°
May
343°
009°
360°
025°
June
295°
299°
068°
007°
July
304°
016°
020°
036°
August
353°
080°
030°
027°
September
260°
090°
029°
072°
October
070°
108°
064°
056°
November
074°
075°
153°
098°
December
129°
138°
126°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.