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
98.8
99
99
99
99
99
February
99.3
99
99
99
100
99
March
98.9
99
100
100
98
98
April
99.1
98
100
98
100
100
May
99.7
99
100
100
100
100
June
99.9
99
100
100
100
100
July
100.0
100
100
100
100
100
August
99.9
100
100
100
100
100
September
99.7
100
100
100
100
98
October
99.9
100
100
100
100
100
November
99.5
98
100
100
100
December
99.2
99
100
100
100
Average
99.5
99.3
99.6
99.5
99.6
99.3
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
17.8
19
19
17
20
16
February
18.5
19
17
18
20
18
March
20.3
22
22
17
20
21
April
23.6
26
24
25
24
23
May
27.1
27
27
26
28
27
June
29.0
31
29
29
29
28
July
31.7
33
33
31
32
31
August
31.6
32
32
31
33
32
September
30.4
30
31
30
30
32
October
28.3
27
30
28
27
31
November
24.8
25
25
26
24
December
20.6
22
23
20
21
Average
25.4
26.4
25.8
25.0
25.6
25.1
Average highest temperature per day
The maximum temperature is typically observed some hours after noon.
Minimum temperatures (°C)
Month
Average
2024
2023
2022
2021
2020
January
11.6
13
12
10
14
11
February
11.4
12
10
12
12
12
March
13.8
15
15
11
15
15
April
16.4
19
15
17
17
17
May
20.7
20
20
20
22
22
June
23.6
25
23
23
23
24
July
26.3
28
26
25
27
27
August
26.8
27
27
26
28
26
September
24.6
25
24
25
24
27
October
21.3
20
22
21
21
23
November
17.7
18
17
18
18
December
14.1
15
14
14
15
Average
19.1
20.1
19.0
18.4
19.6
19.6
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
11.0
16
6
13
7
16
February
6.4
11
6
8
4
4
March
4.9
3
7
8
5
5
April
1.3
1
3
0
1
1
May
0.4
0
0
0
0
2
June
0.1
0
0
0
0
0
July
0.0
0
0
0
0
0
August
0.0
0
0
0
0
0
September
0.0
0
0
0
0
0
October
0.3
0
1
0
0
0
November
3.2
5
4
1
4
December
7.5
6
5
10
4
Average
2.6
2.8
2.5
2.8
2.0
2.7
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
8.2
7
8
8
10
8
February
7.9
7
8
7
8
9
March
8.0
8
8
8
8
9
April
7.7
7
8
8
8
9
May
7.6
8
7
8
8
8
June
7.7
8
8
8
8
9
July
7.8
8
8
8
8
8
August
7.6
8
8
8
8
8
September
7.3
8
7
7
8
7
October
7.3
8
7
7
8
8
November
7.6
8
8
8
7
December
8.1
8
7
9
9
Average
7.7
7.8
7.7
7.7
8.0
8.0
Average wind speed
Excluding wind gusts. Only observations between sunrise and sunset are taken into account.
Prevailing wind direction
Month
2024
2023
2022
2021
2020
January
192°
132°
180°
149°
177°
February
155°
282°
239°
127°
226°
March
261°
265°
294°
289°
278°
April
296°
293°
303°
299°
298°
May
278°
307°
294°
300°
304°
June
303°
297°
298°
301°
290°
July
274°
290°
280°
276°
288°
August
288°
295°
302°
288°
280°
September
310°
308°
309°
301°
316°
October
337°
315°
314°
331°
334°
November
275°
141°
110°
133°
December
147°
124°
155°
126°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.