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
96.9
95
100
99
100
90
February
94.9
98
91
97
87
93
March
94.8
93
100
90
97
100
April
97.4
97
100
100
99
96
May
98.4
99
100
96
94
100
June
99.2
100
99
99
99
99
July
98.6
98
99
99
99
99
August
98.1
96
97
99
99
99
September
98.7
97
98
98
99
99
October
97.0
98
89
99
100
100
November
96.4
93
96
100
100
December
96.2
91
100
100
100
Average
97.3
96.9
96.3
97.5
97.7
97.9
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
33.3
35
34
33
35
32
February
35.9
37
37
35
36
36
March
38.6
40
39
38
38
39
April
39.7
41
40
40
40
39
May
38.2
40
37
39
38
39
June
35.2
36
35
35
36
35
July
31.8
31
33
32
32
31
August
30.5
31
31
30
31
30
September
32.0
32
33
31
33
32
October
34.7
34
35
34
35
35
November
35.6
37
35
36
35
December
33.8
34
34
35
35
Average
35.0
35.6
35.3
34.5
35.3
34.8
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
17.5
18
18
17
19
18
February
20.8
21
21
20
20
21
March
23.3
26
22
22
25
24
April
26.0
28
25
26
25
27
May
25.8
27
24
25
26
27
June
24.2
25
24
24
24
24
July
22.9
23
24
23
23
23
August
22.3
23
21
23
22
22
September
22.3
22
23
22
23
22
October
22.1
22
23
22
23
21
November
18.9
20
17
20
18
December
17.4
17
18
18
18
Average
22.1
23.5
21.7
21.6
22.3
21.8
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
0.0
0
0
0
0
0
March
0.2
0
0
0
0
0
April
0.3
1
0
0
0
1
May
0.9
1
1
2
2
1
June
0.8
1
1
3
1
0
July
2.3
4
1
3
2
2
August
6.9
8
9
6
6
7
September
1.9
3
0
4
1
3
October
0.4
0
1
0
1
1
November
0.0
0
0
0
0
December
0.0
0
0
0
0
Average
1.2
1.6
1.0
1.4
1.0
1.3
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
7.5
7
7
8
8
8
February
7.6
8
7
8
7
9
March
7.0
7
6
6
7
7
April
7.2
7
7
7
7
8
May
6.8
7
6
7
6
7
June
6.3
6
6
6
6
6
July
5.7
6
6
6
6
6
August
5.8
6
6
6
5
5
September
4.8
5
5
4
4
5
October
4.9
5
5
5
5
5
November
6.6
6
7
7
7
December
7.4
8
6
7
7
Average
6.4
6.4
6.4
6.2
6.3
6.6
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
060°
054°
063°
055°
057°
February
055°
068°
054°
056°
067°
March
056°
057°
051°
059°
038°
April
118°
078°
053°
168°
060°
May
217°
215°
214°
226°
215°
June
230°
220°
220°
227°
228°
July
232°
225°
235°
238°
234°
August
244°
248°
251°
244°
243°
September
211°
221°
225°
213°
248°
October
151°
221°
101°
219°
075°
November
060°
064°
069°
066°
December
056°
067°
067°
063°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.