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
49.6
59
47
32
66
31
February
59.4
53
52
37
66
52
March
74.9
77
67
77
63
79
April
75.1
84
69
72
71
71
May
70.7
70
67
82
60
76
June
46.7
53
38
75
47
46
July
33.0
31
31
29
36
29
August
37.4
28
30
48
16
60
September
36.2
43
37
39
24
28
October
51.5
56
53
50
52
November
64.7
64
75
39
64
December
65.5
54
86
40
77
Average
56.5
55.6
48.4
60.1
59.0
56.1
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
33.4
35
34
31
34
34
February
34.3
36
35
32
35
36
March
32.5
34
30
31
33
34
April
32.0
34
31
31
33
32
May
31.4
32
32
31
31
32
June
30.0
31
30
30
29
30
July
28.4
29
30
28
28
28
August
28.6
29
29
29
27
30
September
29.1
31
30
29
26
29
October
29.9
31
29
27
31
November
31.2
31
32
28
32
December
32.7
34
33
31
33
Average
31.1
32.2
31.4
30.4
30.3
31.7
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
22.1
23
22
24
21
20
February
24.0
25
24
27
22
23
March
24.7
25
23
26
24
25
April
24.1
24
24
25
24
25
May
23.7
25
22
25
24
24
June
23.2
24
22
29
23
21
July
23.5
23
22
27
25
24
August
23.0
22
22
23
24
22
September
23.2
22
24
23
24
24
October
23.4
23
23
25
23
November
23.5
24
23
24
23
December
22.6
21
23
26
23
Average
23.4
23.6
22.6
24.2
23.8
23.0
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
0.1
0
0
0
0
0
February
0.1
1
0
0
0
0
March
0.8
1
1
0
1
0
April
0.5
1
0
1
0
2
May
1.3
1
2
3
2
1
June
5.2
1
10
0
3
4
July
11.5
12
4
21
5
19
August
11.6
19
7
10
6
5
September
8.0
7
8
7
11
10
October
2.5
1
2
0
0
November
0.9
2
1
0
1
December
0.2
0
0
2
0
Average
3.3
4.8
3.3
3.2
1.4
3.3
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
4.0
4
4
4
3
5
February
4.3
4
5
4
3
5
March
4.5
4
5
4
4
5
April
4.6
5
5
4
4
5
May
4.2
4
4
4
4
4
June
4.2
4
4
6
5
4
July
4.2
4
4
5
5
4
August
4.5
5
4
5
4
4
September
4.2
5
4
4
3
4
October
3.7
4
4
3
4
November
3.3
4
3
4
3
December
3.4
4
3
4
3
Average
4.1
4.4
4.1
3.9
3.9
4.0
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
010°
349°
026°
268°
014°
February
253°
270°
282°
262°
356°
March
211°
212°
220°
225°
231°
April
200°
211°
215°
207°
213°
May
221°
233°
213°
215°
221°
June
208°
238°
225°
226°
217°
July
219°
241°
241°
226°
230°
August
215°
242°
242°
228°
249°
September
238°
240°
248°
246°
224°
October
209°
223°
203°
218°
November
224°
219°
225°
221°
December
010°
266°
034°
248°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.