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
64.2
71
71
69
66
February
70.0
73
77
79
75
March
69.1
77
67
77
63
April
65.9
78
85
73
80
27
May
77.1
77
84
74
79
83
June
77.6
73
69
100
81
78
July
67.0
70
73
100
70
79
August
65.5
66
69
97
73
84
September
70.6
69
100
72
89
October
71.5
67
66
72
November
63.7
69
48
62
December
62.3
66
58
76
Average
69.5
73.4
70.7
74.3
70.8
70.7
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
33.8
36
24
29
37
February
33.7
36
26
33
35
March
33.4
35
31
32
35
April
29.9
31
26
28
31
30
May
26.6
30
25
19
25
28
June
22.0
22
22
0
23
23
July
21.8
21
21
0
20
24
August
23.2
25
25
0
22
22
September
28.2
26
0
27
29
October
30.7
32
28
32
November
33.6
35
31
33
December
31.0
36
25
16
Average
28.4
29.4
27.5
22.2
26.9
28.9
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
18.8
21
10
18
21
February
19.2
20
16
12
22
March
18.8
21
16
16
21
April
16.6
16
18
14
18
17
May
13.3
16
11
9
12
15
June
8.8
9
7
0
9
10
July
7.7
6
7
0
6
10
August
8.6
10
10
0
8
8
September
12.1
9
0
11
13
October
16.0
16
16
17
November
18.0
19
18
17
December
16.2
18
9
8
Average
14.3
14.9
12.2
11.5
12.6
14.8
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
1.0
1
1
3
1
February
2.1
0
7
2
6
March
1.3
1
4
1
1
April
0.7
1
0
0
2
1
May
0.1
0
0
1
1
0
June
0.0
0
0
0
0
0
July
0.2
0
0
0
0
0
August
0.0
0
0
0
0
0
September
0.0
0
0
0
0
October
0.2
0
0
0
November
0.1
1
0
0
December
0.5
1
0
0
Average
0.6
0.3
0.2
2.2
0.6
0.7
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
5.7
7
1
6
7
February
5.4
6
4
6
7
March
5.6
7
6
6
7
April
6.2
7
7
6
8
7
May
6.7
8
6
6
7
7
June
7.7
10
7
0
9
9
July
7.9
6
9
0
9
9
August
7.5
7
9
0
8
8
September
7.0
7
0
5
8
October
5.8
7
0
7
November
5.9
7
0
8
December
5.6
7
0
7
Average
6.2
7.2
7.2
4.6
5.3
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
250°
129°
161°
259°
February
240°
055°
231°
065°
March
003°
023°
359°
009°
April
356°
014°
039°
019°
358°
May
014°
325°
012°
011°
023°
June
017°
331°
360°
013°
016°
July
324°
023°
360°
015°
024°
August
344°
019°
360°
006°
010°
September
262°
360°
341°
340°
October
240°
360°
261°
November
272°
360°
249°
December
235°
360°
230°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.