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
98.4
99
94
100
100
100
February
97.1
99
96
96
96
100
March
99.4
100
99
100
100
99
April
98.0
98
98
100
99
100
May
98.1
98
95
100
100
95
June
97.6
95
98
96
98
97
July
98.0
100
99
96
97
100
August
98.5
100
97
100
98
September
98.5
98
97
98
100
October
98.0
99
95
97
99
November
98.2
98
97
98
98
December
97.7
96
94
97
100
Average
98.1
98.5
97.3
97.2
98.1
98.6
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
24.1
25
23
26
24
23
February
24.4
24
23
26
25
25
March
22.7
21
22
24
23
22
April
20.5
20
21
22
21
20
May
17.8
17
19
19
18
18
June
15.8
17
16
16
17
16
July
15.1
15
15
16
15
15
August
15.4
15
16
16
16
September
16.5
17
17
17
16
October
18.1
19
18
18
19
November
20.5
20
21
22
21
December
22.7
23
22
24
22
Average
19.5
19.8
19.2
20.1
19.7
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
17.3
18
18
17
17
17
February
17.1
16
17
19
16
17
March
15.6
14
14
16
15
15
April
13.8
14
15
14
14
13
May
11.3
10
13
12
11
11
June
9.7
11
9
11
11
10
July
9.0
9
10
11
9
9
August
9.2
8
10
9
9
September
10.5
12
11
10
10
October
12.4
13
12
13
13
November
13.9
13
14
15
14
December
16.4
17
16
18
15
Average
13.0
13.0
13.0
13.4
13.1
12.8
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
13.3
6
23
5
18
4
February
12.9
5
17
11
8
3
March
13.5
11
3
11
19
11
April
17.0
7
14
11
17
17
May
18.9
12
15
14
23
27
June
25.4
6
19
30
22
34
July
29.1
16
18
38
24
32
August
27.0
12
20
31
26
September
21.4
14
23
19
13
October
18.1
8
22
25
15
November
19.0
10
37
16
24
December
15.6
19
16
18
11
Average
18.3
8.6
14.3
19.5
19.6
17.2
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
12.7
11
13
12
12
14
February
11.6
12
13
12
11
12
March
10.8
12
11
11
10
11
April
11.0
11
13
11
11
11
May
10.2
10
13
10
10
10
June
9.5
8
10
10
10
11
July
10.7
9
14
11
10
12
August
11.3
10
10
12
12
September
13.0
14
11
13
14
October
12.8
14
12
13
12
November
11.8
12
12
11
13
December
12.5
12
11
12
14
Average
11.5
10.7
12.2
11.1
11.4
12.1
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
256°
076°
231°
248°
234°
February
235°
216°
021°
024°
237°
March
233°
235°
070°
298°
247°
April
253°
070°
199°
250°
248°
May
227°
001°
266°
219°
139°
June
038°
191°
294°
275°
045°
July
243°
239°
303°
287°
254°
August
241°
346°
279°
291°
September
274°
331°
262°
259°
October
248°
257°
280°
342°
November
235°
285°
249°
248°
December
265°
189°
270°
245°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.