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
92.3
98
98
82
100
100
February
88.1
96
98
72
100
75
March
95.3
100
100
88
80
100
April
95.8
96
94
100
100
May
96.9
98
100
100
0
June
79.3
67
88
83
67
July
91.5
100
85
63
100
August
82.9
87
83
86
40
September
95.6
95
98
100
50
October
94.7
100
94
67
83
November
97.8
100
100
75
90
December
93.8
96
97
100
100
Average
90.9
98.0
95.3
89.5
85.4
79.5
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
26.4
25
28
28
20
20
February
26.0
24
26
28
24
26
March
22.7
24
21
24
22
21
April
18.2
19
15
23
25
May
15.0
16
14
11
25
June
11.8
11
13
14
12
July
12.1
12
10
13
20
August
11.6
14
11
16
9
September
14.0
15
14
9
20
October
20.1
20
20
25
21
November
21.6
21
22
18
22
December
21.6
22
23
23
23
Average
19.1
24.3
19.0
19.3
17.6
20.0
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
22.1
22
23
22
20
20
February
21.5
18
21
23
24
25
March
19.3
18
17
21
22
21
April
15.3
14
12
23
25
May
11.4
11
10
9
25
June
9.9
8
10
12
12
July
9.7
8
9
11
20
August
9.4
11
9
14
8
September
10.1
9
10
9
20
October
17.3
16
17
25
21
November
18.3
17
17
18
22
December
18.2
17
17
23
23
Average
17.2
19.5
14.7
15.3
16.9
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
0.4
0
0
1
0
0
February
1.8
0
0
6
0
0
March
0.0
0
0
0
0
0
April
0.0
0
0
0
0
May
1.0
0
0
0
0
June
10.3
12
12
0
0
July
1.6
0
0
13
0
August
3.4
5
0
0
20
September
1.0
2
0
0
0
October
0.0
0
0
0
0
November
0.0
0
0
0
0
December
1.0
2
0
0
0
Average
1.5
1.4
1.5
1.8
2.2
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
6.9
6
8
7
6
11
February
7.1
7
7
7
7
7
March
6.0
4
7
6
9
2
April
6.8
6
8
8
7
May
5.7
6
5
7
9
June
8.2
8
9
7
3
July
7.0
6
9
7
10
August
6.9
8
6
7
10
September
4.3
4
5
4
8
October
7.6
8
7
10
9
November
7.2
6
8
5
9
December
6.6
7
5
5
5
Average
7.0
6.0
6.7
6.7
6.9
7.6
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
073°
100°
066°
201°
220°
February
085°
096°
066°
086°
070°
March
055°
054°
068°
011°
063°
April
073°
087°
076°
310°
May
071°
099°
098°
097°
June
214°
140°
087°
009°
July
072°
105°
092°
006°
August
074°
113°
360°
257°
September
042°
084°
068°
172°
October
076°
068°
083°
108°
November
082°
070°
215°
309°
December
090°
240°
206°
330°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.