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
90.1
82
91
82
92
93
February
88.9
91
88
94
93
74
March
91.8
89
92
92
95
91
April
91.6
94
91
86
96
96
May
90.5
85
89
92
91
93
June
87.3
90
84
82
87
86
July
87.7
74
88
94
94
83
August
81.4
78
87
83
86
September
81.6
88
69
83
78
October
78.0
70
87
70
75
November
85.1
85
88
88
87
December
89.9
92
88
90
85
Average
87.1
86.2
86.2
86.4
88.4
85.3
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
27.8
28
27
27
29
28
February
27.4
29
28
27
27
26
March
27.6
28
28
28
29
27
April
25.2
28
24
25
24
25
May
23.5
26
23
21
23
23
June
22.6
25
22
21
21
24
July
22.8
23
23
25
21
24
August
22.6
25
22
23
23
September
25.7
29
21
27
28
October
25.3
26
25
23
27
November
25.3
29
24
24
26
December
27.0
29
26
25
27
Average
25.3
26.6
25.9
24.3
24.6
25.3
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
18.5
19
19
19
11
20
February
18.6
20
20
19
15
19
March
19.1
20
20
20
17
18
April
17.4
19
17
17
17
16
May
15.3
18
15
14
15
14
June
14.6
16
14
13
14
16
July
13.5
14
14
15
11
14
August
13.8
15
13
15
14
September
15.9
18
13
16
17
October
16.4
18
17
16
14
November
16.4
19
16
16
15
December
17.8
20
19
17
13
Average
16.5
18.0
17.3
16.0
15.0
15.7
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
8.7
10
9
14
3
7
February
8.2
7
8
5
6
13
March
5.3
9
5
10
2
2
April
4.1
1
4
5
3
1
May
3.3
4
4
4
3
2
June
3.7
0
6
3
2
5
July
2.3
5
3
1
2
0
August
5.9
4
4
4
7
September
5.0
3
12
2
5
October
8.1
7
4
13
9
November
6.4
7
7
7
5
December
6.9
2
17
11
4
Average
5.7
5.3
5.2
6.9
5.0
4.9
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
7.9
9
8
7
8
8
February
7.8
7
9
8
8
8
March
7.6
8
7
8
7
8
April
7.4
7
8
8
8
7
May
7.0
8
6
8
7
7
June
6.6
7
7
7
6
7
July
6.7
6
7
7
7
8
August
7.6
8
8
7
7
September
7.7
8
8
8
8
October
8.0
8
8
8
8
November
8.7
9
9
9
8
December
8.2
8
8
8
8
Average
7.6
7.3
7.8
7.7
7.4
7.7
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
187°
327°
234°
358°
203°
February
152°
323°
155°
153°
162°
March
155°
122°
306°
167°
152°
April
107°
143°
158°
157°
144°
May
338°
130°
342°
315°
329°
June
353°
352°
118°
133°
351°
July
130°
069°
019°
098°
010°
August
141°
135°
133°
127°
September
118°
152°
150°
144°
October
147°
158°
146°
157°
November
158°
154°
153°
160°
December
159°
159°
155°
176°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.