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
96.2
93
97
96
97
99
February
97.4
98
96
98
97
99
March
98.4
99
98
98
99
98
April
98.6
97
100
99
98
May
99.2
98
100
100
100
June
98.7
98
99
100
99
July
98.2
98
98
97
99
August
97.9
97
98
99
100
September
98.3
98
100
96
99
October
97.9
99
99
99
98
November
97.3
95
99
98
96
December
96.2
95
97
98
97
Average
97.7
96.4
97.2
98.4
98.3
98.3
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
29.1
30
30
29
29
30
February
31.2
31
31
30
31
32
March
33.8
36
34
32
34
34
April
35.9
36
35
36
38
May
35.9
36
36
36
36
June
33.9
38
33
34
33
July
33.4
34
33
34
34
August
33.5
34
33
34
34
September
33.1
34
32
34
33
October
31.8
33
31
33
31
November
29.9
30
31
30
29
December
29.2
28
30
31
29
Average
32.5
32.2
33.1
32.1
32.7
32.6
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
17.2
13
17
19
19
19
February
17.2
13
16
19
18
18
March
18.5
17
18
19
19
18
April
21.1
21
21
21
22
May
22.2
20
23
22
23
June
21.3
20
21
19
23
July
20.3
16
22
21
22
August
21.6
19
23
23
22
September
21.2
16
23
22
22
October
21.1
19
23
22
22
November
18.7
11
22
20
20
December
17.4
13
20
19
19
Average
19.2
14.1
17.1
21.0
20.2
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
2.8
3
2
3
4
2
February
2.1
1
2
4
2
1
March
0.8
0
0
1
1
2
April
0.3
0
1
0
0
May
0.7
0
1
0
3
June
2.3
0
4
2
4
July
2.1
5
2
2
2
August
1.4
2
3
2
2
September
0.8
1
2
1
0
October
3.5
3
2
1
4
November
4.4
7
3
3
12
December
3.3
7
2
3
3
Average
2.0
1.3
2.3
2.2
1.6
2.8
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
3.6
3
3
4
4
5
February
4.5
5
4
4
4
5
March
4.9
5
5
4
5
6
April
4.8
5
4
5
5
May
4.6
5
3
5
5
June
4.2
4
3
4
5
July
3.7
4
3
4
4
August
3.4
3
3
4
4
September
3.2
3
3
4
4
October
3.5
3
3
3
5
November
3.4
3
3
3
5
December
3.3
3
3
3
3
Average
3.9
4.2
3.8
3.3
4.0
4.6
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
015°
059°
348°
011°
028°
February
008°
074°
013°
010°
066°
March
040°
065°
039°
056°
064°
April
043°
068°
049°
059°
May
029°
068°
081°
048°
June
071°
085°
084°
078°
July
096°
085°
085°
074°
August
047°
078°
072°
074°
September
054°
032°
069°
015°
October
010°
004°
022°
299°
November
327°
021°
322°
324°
December
340°
061°
064°
349°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.