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
83.5
95
84
86
91
71
February
83.9
81
83
92
80
92
March
92.1
93
87
97
92
98
April
96.0
98
89
98
97
99
May
95.2
94
94
97
98
100
June
96.2
97
98
98
92
98
July
96.3
98
93
98
93
93
August
98.0
99
97
99
98
98
September
95.1
96
98
96
92
October
94.4
90
95
93
97
November
87.4
92
91
83
89
December
76.2
73
82
65
82
Average
92.8
95.0
91.0
95.5
91.5
93.7
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
6.8
7
8
8
6
9
February
8.4
10
9
10
8
9
March
10.7
12
10
13
10
10
April
13.8
14
12
13
10
16
May
17.9
20
17
18
15
18
June
21.5
19
24
21
22
21
July
22.3
22
22
23
22
21
August
22.7
23
21
25
21
25
September
19.7
23
20
21
20
October
15.6
16
17
15
14
November
10.4
11
11
10
12
December
7.6
9
4
8
8
Average
15.0
15.9
15.0
15.5
13.9
15.2
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
2.2
2
4
3
1
4
February
2.7
6
3
4
1
5
March
3.7
6
4
3
3
4
April
5.7
7
5
6
3
6
May
9.2
12
9
9
7
8
June
13.1
12
14
13
13
13
July
14.1
14
15
14
14
13
August
14.5
15
14
16
14
16
September
11.8
14
12
13
11
October
9.5
11
10
9
9
November
5.3
6
6
5
6
December
3.2
5
-1
3
3
Average
8.0
9.3
8.7
8.1
7.1
8.2
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
21.6
25
22
19
21
17
February
23.3
27
19
26
21
36
March
17.0
24
31
5
14
13
April
14.4
28
17
12
16
7
May
12.1
20
10
10
25
5
June
10.4
16
4
10
12
15
July
14.5
19
22
9
13
21
August
14.0
10
22
5
19
14
September
16.8
12
26
7
11
October
25.1
30
12
30
33
November
27.8
50
23
28
16
December
28.0
25
22
32
26
Average
17.2
20.0
20.0
13.2
18.5
16.5
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
11.6
12
13
11
11
12
February
12.8
13
11
18
11
18
March
11.7
11
13
9
12
13
April
10.5
13
10
12
10
9
May
9.2
9
9
9
11
10
June
9.1
9
9
9
7
9
July
9.5
10
12
9
9
10
August
9.4
10
10
8
10
10
September
9.0
8
8
8
9
October
11.1
11
11
11
12
November
10.4
13
12
9
10
December
11.0
14
8
10
10
Average
10.2
10.5
10.8
9.8
9.6
10.8
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
236°
229°
258°
245°
216°
February
218°
256°
237°
139°
232°
March
200°
227°
092°
260°
208°
April
242°
025°
014°
348°
051°
May
254°
018°
268°
250°
331°
June
267°
023°
275°
341°
255°
July
250°
245°
281°
275°
255°
August
230°
260°
356°
274°
240°
September
180°
249°
219°
226°
October
205°
207°
206°
199°
November
213°
181°
232°
200°
December
232°
126°
204°
183°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.