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
95.2
87
99
100
94
100
February
91.5
81
95
96
81
100
March
84.6
65
97
83
84
85
April
79.0
50
72
71
78
99
May
84.7
63
85
92
86
87
June
79.3
35
84
90
66
83
July
73.9
59
57
74
80
87
August
78.0
64
84
63
75
76
September
88.0
81
82
80
87
97
October
97.4
97
90
100
100
November
98.4
95
100
100
100
December
99.2
98
100
100
99
Average
85.6
63.5
86.3
85.3
85.0
92.0
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
16.8
20
16
16
18
16
February
19.4
21
16
20
20
22
March
22.9
25
22
21
21
24
April
27.2
28
30
26
29
27
May
32.3
34
30
32
34
32
June
37.6
38
37
39
39
37
July
41.6
43
43
41
42
41
August
39.9
40
40
41
41
40
September
34.9
32
35
36
38
35
October
28.4
29
29
29
28
November
22.2
25
24
20
21
December
18.5
19
20
18
18
Average
28.9
31.3
28.9
28.9
29.1
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
3.3
5
3
3
5
1
February
6.6
7
6
7
8
7
March
10.6
12
13
10
10
11
April
15.4
16
22
13
17
15
May
20.1
21
19
20
21
20
June
25.0
26
25
26
25
25
July
29.2
30
30
28
29
29
August
28.1
29
28
29
28
29
September
23.0
22
23
24
24
24
October
16.5
17
18
17
16
November
9.0
10
10
8
11
December
5.0
5
9
5
5
Average
16.4
18.8
16.8
16.6
16.5
16.1
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
0.2
0
0
1
0
0
February
0.2
0
1
0
0
0
March
0.4
0
0
0
1
0
April
0.0
0
0
0
0
0
May
0.3
0
0
0
0
0
June
0.0
0
0
0
0
0
July
0.0
0
0
0
0
0
August
0.2
1
0
0
0
0
September
0.8
3
1
2
0
0
October
0.3
1
1
0
0
November
0.5
0
0
2
1
December
0.7
0
2
0
0
Average
0.3
0.4
0.2
0.3
0.2
0.0
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
5.9
4
6
6
7
4
February
7.1
8
8
5
9
4
March
9.1
10
7
9
8
9
April
9.6
9
7
11
10
9
May
8.8
9
9
8
9
9
June
8.8
11
9
8
10
9
July
7.7
8
7
6
7
7
August
7.4
7
6
8
8
7
September
7.5
6
8
9
7
7
October
6.4
6
7
6
5
November
5.8
5
5
6
6
December
5.6
6
5
6
6
Average
7.6
8.2
7.1
7.4
7.9
7.1
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
211°
005°
120°
278°
271°
February
336°
102°
038°
090°
091°
March
211°
235°
201°
073°
071°
April
070°
190°
022°
130°
147°
May
181°
323°
171°
183°
141°
June
188°
152°
207°
213°
182°
July
178°
153°
151°
154°
157°
August
146°
124°
177°
165°
162°
September
162°
181°
178°
218°
167°
October
183°
130°
148°
187°
November
337°
269°
001°
168°
December
357°
197°
353°
306°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.