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
2025
2024
2023
2022
2021
January
97.7
97
100
100
99
97
February
98.0
98
100
98
100
March
99.2
99
100
100
99
April
97.9
100
99
100
May
98.3
100
100
100
100
June
99.4
100
100
100
100
July
99.6
100
100
100
100
August
97.9
100
100
100
98
September
99.4
98
100
100
100
October
99.0
100
100
100
100
November
99.1
98
100
100
100
December
98.6
100
100
100
92
Average
98.7
97.9
99.5
100.0
99.4
98.5
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
2025
2024
2023
2022
2021
January
26.2
27.1
28.3
31.0
24.0
24.6
February
24.4
24.6
26.6
26.3
24.1
March
23.7
24.3
21.0
20.3
22.8
April
19.8
20.6
17.6
22.6
May
18.3
21.5
16.1
17.8
17.6
June
14.8
14.5
13.3
12.8
15.5
July
14.8
14.8
12.8
14.8
14.8
August
18.1
19.6
16.8
16.5
16.6
September
22.0
21.1
21.1
21.0
21.0
October
24.1
23.1
26.0
25.0
18.0
November
25.3
24.6
26.3
22.8
20.8
December
25.6
26.3
25.1
23.6
23.6
Average
21.8
25.4
21.2
20.6
19.9
20.1
Average highest temperature per day
The maximum temperature is typically observed some hours after noon.
Minimum temperatures (°C)
Month
Average
2025
2024
2023
2022
2021
January
18.6
20.8
23.0
26.0
20.1
20.1
February
18.7
20.0
22.1
21.3
20.1
March
16.9
18.8
14.0
15.5
18.6
April
14.3
16.8
13.5
17.6
May
11.0
15.9
12.5
11.5
9.0
June
6.7
8.3
10.6
8.5
6.2
July
7.0
7.2
9.1
9.4
10.0
August
9.2
12.1
11.6
13.0
9.4
September
13.3
14.8
14.3
17.1
21.0
October
16.6
16.8
19.8
20.6
15.5
November
17.7
19.6
21.3
19.3
17.1
December
19.2
22.1
21.3
18.6
18.6
Average
15.1
19.8
15.0
15.9
15.4
14.0
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2025
2024
2023
2022
2021
January
5.0
3
0
0
8
17
February
9.0
6
0
2
13
March
3.3
3
0
8
4
April
5.7
0
16
1
May
1.5
0
4
0
0
June
0.8
0
0
11
0
July
1.3
2
0
0
0
August
1.6
0
0
0
4
September
1.9
3
0
0
0
October
0.8
1
0
7
0
November
2.2
2
0
0
16
December
5.2
2
6
9
19
Average
3.6
3.6
1.2
1.6
6.1
5.6
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
2025
2024
2023
2022
2021
January
5.0
7
5
1
4
5
February
4.6
6
6
7
5
March
4.4
5
7
4
5
April
4.1
4
4
4
May
3.4
3
5
4
3
June
3.1
3
2
4
3
July
4.4
6
2
4
4
August
5.4
6
4
5
5
September
6.2
7
5
7
14
October
7.1
8
5
9
4
November
7.6
8
7
8
9
December
6.6
8
10
6
10
Average
5.4
5.8
6.5
5.8
5.1
4.7
Average wind speed
Excluding wind gusts. Only observations between sunrise and sunset are taken into account.
Prevailing wind direction
Month
2025
2024
2023
2022
2021
January
342°
272°
300°
333°
336°
February
001°
325°
292°
278°
March
325°
006°
289°
313°
April
329°
326°
270°
May
313°
353°
333°
276°
June
292°
254°
326°
342°
July
293°
025°
301°
244°
August
319°
277°
322°
310°
September
305°
297°
339°
286°
October
304°
294°
313°
360°
November
323°
312°
344°
329°
December
343°
012°
310°
328°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.