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
80.9
91
83
80
82
70
February
85.3
80
84
91
77
95
March
90.1
87
85
93
91
94
April
94.7
97
87
96
97
97
May
95.4
95
94
96
95
98
June
95.9
96
97
99
91
96
July
93.8
98
95
97
89
90
August
95.5
98
93
99
94
94
September
91.5
94
96
89
88
October
90.0
86
92
89
94
November
82.9
85
87
77
82
December
72.6
75
76
61
71
Average
89.5
93.6
89.5
93.6
87.9
90.6
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
6.9
6
8
7
5
8
February
8.9
10
9
10
7
9
March
10.8
12
10
13
10
10
April
13.4
14
13
13
10
17
May
17.7
20
18
18
15
18
June
21.7
20
24
21
22
22
July
21.7
22
22
23
22
21
August
23.1
24
22
25
20
25
September
20.4
23
19
20
20
October
15.3
16
17
15
14
November
10.2
10
11
10
12
December
7.1
8
4
7
8
Average
13.9
16.1
15.0
15.4
13.6
15.1
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
2.4
1
3
3
1
4
February
3.1
5
2
4
0
4
March
2.9
5
4
1
3
3
April
4.0
7
4
4
2
4
May
8.3
11
8
9
7
7
June
12.2
12
13
11
13
13
July
13.0
14
14
13
14
12
August
13.7
14
13
14
13
15
September
11.0
12
10
12
10
October
8.5
10
9
8
8
November
4.7
5
6
5
5
December
2.7
4
-1
3
3
Average
6.7
8.6
7.6
6.9
6.5
7.4
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
18.3
22
22
15
17
16
February
19.1
21
11
20
12
31
March
14.5
19
27
5
11
11
April
14.9
24
19
13
17
3
May
11.5
9
9
10
26
5
June
8.8
10
4
9
7
14
July
13.1
12
18
7
11
18
August
12.0
9
21
4
14
13
September
12.5
10
21
8
12
October
20.8
21
13
21
29
November
18.1
39
12
12
14
December
16.9
21
11
16
26
Average
13.7
14.5
17.2
10.8
14.1
14.7
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
10.6
11
12
10
10
11
February
12.4
11
10
16
10
16
March
10.5
10
11
8
11
13
April
10.2
11
10
11
10
9
May
8.8
8
9
9
10
9
June
8.2
9
9
8
7
9
July
8.6
8
10
8
8
9
August
8.3
8
9
8
9
8
September
7.3
7
7
7
8
October
9.6
10
9
10
10
November
9.5
12
10
8
9
December
9.6
12
7
9
9
Average
9.3
9.2
9.7
8.9
8.9
9.8
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
229°
228°
252°
234°
216°
February
215°
265°
237°
145°
230°
March
200°
234°
085°
266°
218°
April
243°
027°
020°
343°
049°
May
226°
016°
279°
249°
332°
June
271°
011°
288°
340°
258°
July
252°
241°
292°
283°
258°
August
234°
258°
003°
281°
238°
September
178°
266°
214°
225°
October
207°
207°
204°
196°
November
213°
184°
230°
200°
December
231°
150°
204°
188°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.