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
97.6
99
100
97
91
February
98.8
98
100
100
98
March
97.5
98
96
97
100
April
98.6
99
100
100
100
May
99.6
100
100
99
100
June
99.1
100
100
99
98
July
99.5
98
100
100
100
August
98.7
99
99
98
99
September
99.2
98
100
99
100
October
98.4
97
98
98
99
November
98.7
100
100
99
100
December
97.8
100
99
95
95
Average
98.7
98.6
99.2
98.5
98.4
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
16.2
17.6
16.6
16.5
14.6
February
17.2
18.6
16.3
18.3
16.6
March
18.4
18.0
19.5
17.1
19.1
April
20.2
21.3
23.6
19.1
20.1
May
23.6
23.5
23.8
24.3
24.1
June
25.4
24.6
27.1
26.0
24.5
July
28.4
28.3
30.0
29.3
28.8
August
28.8
29.3
31.1
26.5
27.8
September
25.7
25.3
25.1
24.6
25.3
October
23.3
22.5
24.0
23.6
24.0
November
19.5
20.5
20.0
20.3
18.6
December
17.3
17.8
17.0
17.8
17.6
Average
22.0
22.3
22.8
22.1
21.8
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
8.9
11.5
9.4
9.5
8.0
February
10.3
11.8
9.4
10.6
11.5
March
11.4
11.5
11.5
11.4
11.5
April
13.3
13.6
15.0
12.3
14.0
May
15.8
14.8
16.5
17.1
15.0
June
18.2
18.3
20.1
18.3
17.3
July
20.1
20.0
20.6
21.8
19.3
August
20.6
21.6
21.8
19.1
20.1
September
19.0
18.5
18.8
18.3
18.8
October
16.8
16.6
18.1
18.3
17.3
November
13.0
15.1
12.9
13.8
10.6
December
10.5
10.5
9.9
13.5
11.8
Average
14.8
15.3
15.3
15.4
14.6
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
January
2.0
3
1
0
3
February
3.2
6
2
3
4
March
5.7
8
4
12
1
April
3.2
1
0
5
0
May
0.8
0
1
0
1
June
0.5
1
1
1
1
July
0.0
0
0
0
0
August
0.0
0
0
0
0
September
0.9
1
2
2
0
October
3.7
5
6
4
2
November
2.6
5
1
2
1
December
3.7
0
1
12
5
Average
2.0
2.3
1.4
2.9
1.1
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
January
8.4
9
9
9
8
February
9.0
10
10
8
9
March
10.0
11
8
10
9
April
9.8
10
9
10
9
May
9.3
10
10
9
9
June
9.6
10
9
10
9
July
8.7
9
9
9
9
August
8.0
7
8
8
8
September
8.2
9
8
9
8
October
8.4
9
9
7
8
November
8.2
9
8
8
9
December
8.2
8
7
10
10
Average
8.9
9.1
8.5
9.0
8.7
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
106°
325°
067°
272°
February
273°
072°
085°
187°
March
246°
227°
038°
082°
April
186°
201°
255°
188°
May
255°
236°
209°
250°
June
236°
221°
248°
238°
July
234°
249°
185°
254°
August
214°
243°
234°
241°
September
219°
199°
233°
225°
October
225°
173°
145°
142°
November
091°
248°
247°
344°
December
054°
077°
222°
099°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.