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
98.3
98
100
99
97
98
February
97.3
97
99
98
97
98
March
93.0
97
80
96
99
92
April
93.5
96
86
87
92
100
May
93.8
95
94
91
93
93
June
99.2
99
100
99
99
99
July
99.4
100
100
99
99
100
August
99.6
100
100
100
100
100
September
99.6
100
100
99
100
100
October
99.4
99
100
98
100
99
November
99.4
100
99
100
100
December
98.5
99
98
99
100
Average
97.5
97.9
96.1
96.6
97.7
98.0
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
10.4
11
12
9
13
9
February
10.6
13
9
11
10
10
March
12.4
13
13
8
10
15
April
16.9
20
17
17
16
15
May
20.4
20
19
18
21
21
June
25.7
27
25
25
23
27
July
27.7
30
27
26
28
29
August
29.0
29
30
30
29
28
September
25.6
27
26
25
22
28
October
20.7
20
21
20
19
24
November
16.3
18
17
17
15
December
13.2
14
14
13
13
Average
19.3
20.7
19.2
18.4
18.4
19.4
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
3.4
4
3
3
5
3
February
3.6
6
2
4
4
3
March
5.3
6
7
2
3
7
April
8.9
12
9
9
9
7
May
13.0
13
12
11
13
13
June
18.3
19
18
18
17
18
July
20.2
22
19
19
20
21
August
21.1
21
23
22
21
20
September
17.5
19
17
17
16
19
October
12.4
12
13
13
11
14
November
8.3
9
9
9
7
December
6.1
7
8
5
6
Average
11.7
13.3
11.5
11.2
10.9
11.4
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
20.7
21
4
26
27
20
February
18.6
13
20
23
25
19
March
17.7
12
22
24
17
11
April
12.3
2
28
18
20
4
May
11.7
13
15
15
7
14
June
3.9
0
3
8
6
3
July
3.2
2
5
3
3
1
August
1.1
4
1
0
1
0
September
3.7
3
2
8
10
1
October
7.5
8
7
14
7
3
November
11.4
21
9
11
8
December
17.1
20
20
17
10
Average
9.8
7.0
11.5
12.8
11.5
7.1
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
7.2
7
7
9
7
7
February
7.1
7
9
8
7
8
March
6.8
7
7
7
7
6
April
6.4
6
6
6
7
7
May
5.9
6
5
6
6
7
June
6.5
7
6
6
7
7
July
6.5
7
7
6
7
7
August
6.9
7
7
7
7
8
September
7.0
8
7
7
7
8
October
6.6
6
7
6
7
7
November
6.7
8
6
7
7
December
6.4
7
6
7
6
Average
6.6
6.6
6.7
6.6
6.7
6.9
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
104°
083°
097°
090°
062°
February
121°
115°
105°
118°
133°
March
154°
205°
232°
148°
198°
April
220°
247°
167°
185°
236°
May
253°
239°
203°
205°
243°
June
255°
256°
256°
269°
268°
July
273°
253°
248°
279°
279°
August
295°
272°
285°
290°
269°
September
347°
315°
048°
008°
262°
October
047°
038°
038°
014°
048°
November
087°
075°
050°
028°
December
100°
113°
057°
053°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.