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
January
99.4
99
99
100
February
99.7
100
100
100
March
99.4
100
100
99
April
99.1
100
99
May
99.2
99
99
100
June
99.2
100
100
99
99
July
99.8
100
98
100
100
August
100.0
100
100
100
100
September
99.5
99
100
100
October
99.7
100
100
100
November
100.0
100
100
100
December
99.5
98
100
100
Average
99.6
99.7
99.3
99.5
99.7
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
January
29.1
30
30
28
February
30.3
33
28
30
March
29.9
35
29
29
April
28.8
31
27
May
26.1
27
26
26
June
21.7
22
11
22
24
July
21.9
27
0
24
23
August
25.0
28
4
28
28
September
30.5
32
29
31
October
32.3
33
33
31
November
30.9
30
29
33
December
30.6
32
30
30
Average
27.9
28.6
27.4
27.7
28.1
Average highest temperature per day
The maximum temperature is typically observed some hours after noon.
Minimum temperatures (°C)
Month
Average
2024
2023
2022
2021
January
17.7
18
17
19
February
17.6
19
17
17
March
16.4
17
16
17
April
12.6
12
14
May
7.9
11
7
6
June
4.4
6
3
4
4
July
3.1
2
0
6
3
August
6.9
9
1
7
8
September
12.3
14
11
12
October
16.1
16
17
15
November
18.4
20
18
19
December
18.9
19
18
19
Average
12.1
11.3
13.9
12.5
10.7
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
January
2.1
3
1
2
February
0.3
0
0
0
March
0.8
0
1
1
April
0.3
0
1
May
0.1
0
0
0
June
0.3
1
0
0
0
July
0.1
0
0
0
1
August
0.0
1
0
0
0
September
0.0
0
0
0
October
0.5
0
0
2
November
1.4
2
3
0
December
2.1
6
1
1
Average
0.8
1.1
1.0
0.7
0.3
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
January
7.1
6
9
7
February
6.3
7
7
6
March
7.3
7
8
7
April
6.1
7
6
May
5.5
6
5
6
June
6.6
8
3
7
6
July
5.6
5
0
5
7
August
6.6
7
0
7
7
September
7.1
7
7
8
October
8.7
9
8
9
November
6.9
9
6
7
December
6.5
8
5
7
Average
6.8
6.4
7.3
6.4
7.0
Average wind speed
Excluding wind gusts. Only observations between sunrise and sunset are taken into account.
Prevailing wind direction
Month
2024
2023
2022
2021
January
103°
086°
095°
February
090°
099°
094°
March
100°
097°
094°
April
099°
099°
May
095°
104°
105°
June
097°
342°
099°
106°
July
221°
360°
099°
109°
August
103°
070°
097°
092°
September
105°
104°
099°
October
100°
098°
101°
November
100°
092°
082°
December
098°
068°
077°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.