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
94.2
92
92
98
91
94
February
89.7
80
92
95
82
98
March
80.8
80
89
65
90
80
April
79.0
70
57
58
85
97
May
84.8
78
74
89
94
82
June
89.2
82
85
95
83
87
July
95.7
97
96
97
91
98
August
95.5
94
94
88
96
95
September
94.2
93
95
90
89
98
October
95.9
87
97
97
99
99
November
92.3
87
90
90
98
December
93.3
97
94
92
92
Average
90.1
85.2
90.3
87.3
90.3
92.7
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
17.7
19
17
17
19
18
February
20.1
21
19
20
21
23
March
23.7
26
20
23
22
23
April
27.8
27
33
27
28
29
May
33.1
34
31
33
34
35
June
39.4
40
38
42
41
39
July
42.2
42
45
41
42
41
August
40.6
40
40
41
43
42
September
36.2
34
36
38
38
34
October
29.5
31
31
31
29
28
November
22.6
25
24
21
23
December
18.4
18
21
17
18
Average
29.9
31.4
29.6
29.8
29.8
29.3
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
5.4
7
5
4
7
5
February
8.0
10
7
7
11
8
March
11.3
13
8
11
10
11
April
15.6
16
27
14
16
16
May
20.1
21
19
20
21
21
June
25.6
26
25
27
27
25
July
28.5
29
31
28
28
27
August
27.6
28
27
28
29
28
September
24.3
24
24
26
26
23
October
17.8
21
19
19
17
16
November
11.3
13
12
10
12
December
7.5
8
10
6
8
Average
17.5
19.4
17.6
17.4
17.4
16.6
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
0.0
0
0
0
0
0
February
0.5
1
1
0
0
0
March
1.5
0
0
1
0
2
April
0.9
3
0
0
0
1
May
0.3
0
1
0
1
0
June
0.0
0
0
0
0
0
July
0.0
0
0
0
0
0
August
0.0
0
0
0
0
0
September
0.4
2
0
0
0
1
October
0.2
1
0
0
0
0
November
0.8
0
0
0
0
December
0.2
1
1
0
0
Average
0.4
0.7
0.2
0.1
0.1
0.3
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
6.2
6
6
5
7
5
February
7.0
8
6
6
8
5
March
8.2
7
7
8
8
10
April
9.1
10
10
11
9
8
May
8.1
8
9
8
8
8
June
7.8
9
8
7
9
8
July
7.0
7
6
7
7
7
August
6.7
6
6
7
6
6
September
6.7
6
7
6
7
7
October
5.8
7
6
5
6
6
November
6.6
6
8
7
5
December
6.6
6
6
6
8
Average
7.2
7.4
6.8
7.0
7.3
7.0
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
259°
286°
273°
266°
138°
February
276°
065°
060°
110°
238°
March
238°
270°
128°
085°
032°
April
083°
315°
088°
102°
080°
May
142°
055°
239°
098°
089°
June
109°
105°
126°
124°
111°
July
126°
140°
113°
123°
086°
August
101°
117°
119°
138°
106°
September
091°
117°
109°
113°
017°
October
102°
129°
115°
143°
033°
November
282°
282°
279°
097°
December
290°
249°
284°
285°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.