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
January
91.6
95
85
96
February
92.7
92
93
94
March
87.3
82
87
99
April
96.6
99
95
96
May
98.7
98
99
100
June
99.6
100
100
100
July
100.0
100
100
100
August
100.0
100
100
100
September
99.8
100
100
100
October
96.1
97
94
97
November
93.6
95
93
December
92.5
91
94
Average
96.4
96.3
95.3
97.7
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
January
10.6
11
12
9
February
12.0
14
11
11
March
13.4
15
14
11
April
18.5
21
17
18
May
20.9
21
19
23
June
27.2
30
25
27
July
29.7
30
31
28
August
29.9
30
30
30
September
27.0
27
27
27
October
22.1
22
24
21
November
18.2
19
18
December
14.4
14
15
Average
20.7
21.7
20.3
20.2
Average highest temperature per day
The maximum temperature is typically observed some hours after noon.
Minimum temperatures (°C)
Month
Average
2024
2023
2022
January
3.2
4
4
1
February
2.1
4
0
2
March
4.0
4
5
3
April
8.0
10
7
7
May
10.9
10
12
10
June
17.6
18
17
18
July
20.6
24
19
21
August
21.6
22
22
21
September
16.4
17
19
14
October
11.7
12
12
12
November
9.2
10
9
December
7.1
6
9
Average
11.3
12.1
11.0
10.9
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
January
14.2
19
12
13
February
12.5
7
12
18
March
14.2
12
20
6
April
12.0
9
17
9
May
4.2
5
7
1
June
1.6
0
1
3
July
0.8
1
0
2
August
0.4
1
0
1
September
1.3
2
1
2
October
2.2
2
2
3
November
11.6
15
10
December
16.4
19
12
Average
6.4
5.5
7.9
5.8
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
January
9.6
11
8
10
February
9.5
9
11
9
March
8.2
6
10
9
April
8.8
9
8
10
May
9.3
9
10
9
June
10.5
11
10
11
July
12.5
14
10
14
August
12.8
13
14
12
September
10.9
9
14
11
October
10.2
10
9
12
November
8.4
8
9
December
9.4
9
10
Average
10.2
9.9
10.1
10.5
Average wind speed
Excluding wind gusts. Only observations between sunrise and sunset are taken into account.
Prevailing wind direction
Month
2024
2023
2022
January
058°
089°
007°
February
070°
041°
341°
March
037°
046°
011°
April
025°
032°
020°
May
034°
038°
032°
June
034°
040°
038°
July
021°
043°
047°
August
022°
043°
043°
September
018°
049°
046°
October
027°
063°
049°
November
203°
070°
December
068°
083°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.