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
86.9
75
96
80
98
83
February
82.6
86
89
82
70
84
March
86.0
83
100
89
89
87
April
94.9
95
92
98
98
May
92.9
100
93
96
94
June
89.0
99
96
89
64
July
87.0
91
72
92
84
August
93.6
84
100
97
100
September
90.1
91
100
86
85
October
94.9
96
97
99
100
November
97.8
96
100
98
98
December
84.7
85
100
86
95
Average
89.0
80.0
93.0
90.2
91.8
88.9
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
25.9
27
22
26
25
27
February
26.7
23
21
29
26
32
March
30.2
28
30
25
31
31
April
32.6
31
29
35
33
May
35.1
33
33
34
37
June
38.5
39
33
38
40
July
38.4
40
33
36
38
August
36.5
36
32
36
36
September
36.1
35
34
36
37
October
35.6
37
33
37
34
November
31.1
31
29
31
32
December
27.1
26
28
27
26
Average
32.0
26.4
32.3
29.9
32.4
33.6
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
18.7
21
18
22
19
19
February
20.8
21
19
23
21
24
March
23.3
23
27
21
23
25
April
26.7
28
26
30
27
May
30.6
29
32
30
31
June
33.1
31
32
34
34
July
33.4
34
33
34
33
August
32.0
31
31
33
31
September
32.4
33
32
33
33
October
30.4
31
29
31
29
November
25.4
26
24
26
27
December
21.0
19
25
22
20
Average
26.6
21.6
27.5
26.9
27.4
27.6
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
1.4
0
4
0
0
4
March
0.8
0
0
0
0
0
April
0.4
2
0
2
0
May
0.2
0
0
0
0
June
0.0
0
0
0
0
July
0.2
0
6
0
0
August
0.0
0
0
0
0
September
1.7
0
0
0
0
October
1.2
0
0
3
0
November
0.0
0
0
0
0
December
0.2
0
0
0
0
Average
0.4
0.3
0.2
0.4
0.4
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
9.3
7
7
9
10
9
February
9.6
9
9
11
9
10
March
9.6
8
9
10
10
9
April
9.3
9
9
9
11
May
9.8
11
9
11
11
June
10.4
10
10
11
12
July
8.7
10
6
8
7
August
8.3
9
5
7
9
September
8.3
10
8
7
8
October
8.5
8
7
8
9
November
7.1
7
8
6
8
December
8.7
9
6
7
7
Average
8.8
8.0
9.1
8.6
8.5
9.1
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
055°
019°
063°
043°
052°
February
023°
029°
054°
034°
065°
March
019°
037°
031°
047°
036°
April
042°
033°
010°
016°
May
022°
028°
013°
028°
June
024°
025°
021°
036°
July
113°
045°
007°
210°
August
117°
032°
319°
210°
September
030°
016°
031°
024°
October
015°
022°
017°
022°
November
027°
023°
019°
057°
December
040°
005°
032°
039°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.