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
93.2
94
89
90
98
94
February
96.0
97
97
95
95
93
March
97.2
92
98
100
98
100
April
97.0
99
97
98
98
97
May
96.9
94
99
97
97
94
June
97.4
100
90
98
98
100
July
98.3
100
99
100
97
100
August
91.5
92
90
94
92
93
September
89.0
98
78
84
86
October
94.2
98
95
92
81
November
95.0
95
97
95
97
December
95.1
98
92
98
95
Average
95.1
95.7
95.5
94.4
94.9
94.1
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
29.0
30
28
29
30
30
February
29.0
30
30
29
29
29
March
29.5
29
30
30
29
29
April
28.6
30
28
29
28
29
May
26.9
29
27
26
27
25
June
26.3
28
25
26
26
25
July
26.8
29
28
28
26
26
August
28.7
29
30
28
29
28
September
31.7
33
30
34
32
October
30.9
32
31
30
31
November
29.6
32
29
30
30
December
29.4
32
28
29
29
Average
28.8
29.2
29.3
28.4
28.8
28.5
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
20.6
21
20
20
21
21
February
20.4
21
20
21
21
20
March
20.5
21
21
21
21
19
April
19.7
21
19
20
18
20
May
17.3
19
17
16
18
15
June
16.4
18
15
16
16
16
July
15.9
17
17
17
14
16
August
17.5
17
19
17
18
17
September
20.3
22
19
22
22
October
20.8
22
20
20
22
November
20.3
21
19
21
21
December
20.6
22
20
19
21
Average
19.1
19.4
19.4
18.7
18.9
19.1
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
8.8
10
14
11
5
7
February
7.4
5
6
14
9
11
March
4.7
10
6
3
6
2
April
3.1
3
4
0
1
3
May
1.6
0
1
3
2
4
June
0.5
0
1
2
1
0
July
0.0
0
0
0
0
0
August
0.6
0
1
1
0
0
September
2.3
2
5
0
2
October
4.4
3
6
7
5
November
5.8
4
5
7
2
December
7.3
3
12
6
10
Average
3.9
3.5
3.9
4.9
3.4
4.0
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
7
7
February
6.9
7
7
6
7
8
March
6.4
7
6
6
7
7
April
6.2
7
7
4
6
6
May
6.6
7
6
7
6
6
June
6.8
7
6
6
7
8
July
7.1
7
6
8
7
8
August
7.6
8
7
8
8
8
September
7.6
6
8
8
8
October
7.5
7
8
8
8
November
7.5
7
7
7
8
December
7.2
7
8
7
7
Average
7.0
6.9
6.7
6.9
7.0
7.3
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
329°
354°
351°
015°
348°
February
011°
009°
010°
004°
352°
March
013°
047°
030°
014°
054°
April
035°
048°
029°
098°
039°
May
022°
057°
017°
022°
035°
June
028°
047°
058°
044°
043°
July
038°
043°
043°
047°
040°
August
040°
019°
049°
060°
062°
September
024°
030°
033°
046°
October
001°
027°
011°
022°
November
354°
028°
349°
018°
December
357°
352°
017°
022°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.