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
87.8
83
99
February
57.5
24
96
March
56.8
1
96
April
58.2
2
96
87
May
83.0
100
53
96
76
June
87.1
99
93
90
51
July
78.3
100
96
73
0
August
65.1
98
87
52
2
September
52.6
99
0
17
0
October
44.3
100
0
26
November
0.7
0
1
December
96.2
95
98
Average
75.7
98.7
49.1
65.8
67.5
97.5
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
25.9
26
25
February
26.6
27
27
March
27.4
28
27
April
19.8
7
27
28
May
25.6
30
14
28
29
June
30.0
31
30
29
30
July
31.6
32
32
31
31
August
30.3
30
32
30
31
September
29.8
29
30
30
31
October
21.7
29
2
30
November
25.2
0
29
December
26.3
27
26
Average
27.1
30.1
21.7
29.2
28.3
26.0
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
20.2
20
21
February
21.6
21
23
March
20.7
21
21
April
15.3
4
22
22
May
20.6
25
12
23
22
June
24.5
24
25
24
26
July
26.1
27
26
26
26
August
24.8
22
27
26
26
September
24.4
23
27
26
26
October
18.2
25
2
24
November
20.8
0
24
December
21.0
21
21
Average
21.8
24.0
17.3
24.2
23.0
20.7
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
1.7
2
2
February
0.0
0
0
March
0.4
0
1
April
1.6
0
5
0
May
6.5
2
8
10
2
June
3.3
3
2
9
0
July
2.4
2
5
1
0
August
2.0
2
8
1
0
September
0.9
2
0
0
0
October
1.0
2
0
2
November
0.0
0
0
December
7.2
11
4
Average
2.5
2.1
2.1
4.3
0.4
3.7
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
8.1
8
9
February
8.3
8
9
March
8.9
8
10
April
6.6
2
11
8
May
7.2
7
3
8
9
June
7.3
9
6
4
9
July
8.5
10
8
9
5
August
8.4
9
9
8
8
September
7.6
8
8
8
3
October
6.7
8
5
7
November
5.3
6
5
December
8.9
10
8
Average
7.9
8.8
6.1
8.1
8.2
8.3
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
072°
055°
February
097°
117°
March
117°
082°
April
080°
073°
110°
May
075°
147°
095°
083°
June
104°
135°
109°
108°
July
102°
115°
098°
120°
August
102°
106°
093°
088°
September
113°
086°
099°
188°
October
066°
059°
092°
November
308°
076°
December
045°
070°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.