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
99.0
100
100
96
98
99
February
98.8
96
100
100
98
100
March
98.9
100
100
97
100
100
April
98.6
100
100
100
100
98
May
98.3
98
96
97
99
100
June
99.4
100
99
100
100
100
July
99.6
100
100
100
100
100
August
99.5
100
100
100
99
100
September
99.5
99
100
100
99
99
October
99.8
100
100
100
100
100
November
99.4
99
100
100
100
December
99.6
100
100
100
100
Average
99.2
99.3
99.3
99.0
99.4
99.5
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
2024
2023
2022
2021
2020
January
16.1
18
15
15
17
17
February
17.3
18
16
17
20
18
March
18.7
21
14
19
18
19
April
20.3
20
24
20
20
21
May
23.4
24
22
25
24
25
June
28.0
28
28
29
28
27
July
31.3
31
35
31
32
30
August
31.6
32
31
32
33
31
September
29.2
29
30
30
31
27
October
25.4
27
28
27
24
23
November
20.6
22
22
19
21
December
18.2
20
21
18
17
Average
23.6
24.7
24.4
23.9
23.6
23.1
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
7.3
9
6
6
8
7
February
8.0
9
7
7
10
7
March
9.7
10
7
11
9
10
April
11.7
12
15
12
11
12
May
14.7
15
15
15
15
15
June
18.7
19
19
20
19
17
July
21.8
21
25
22
22
21
August
22.0
22
21
22
22
22
September
20.3
20
20
22
21
19
October
16.0
18
17
17
15
14
November
11.8
12
13
11
13
December
9.3
11
12
8
9
Average
14.5
15.4
15.1
14.7
14.3
13.7
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
7.1
7
10
4
2
6
February
4.4
9
3
1
1
1
March
4.9
4
9
5
4
6
April
4.3
4
2
2
5
5
May
4.1
2
13
4
3
1
June
0.2
0
1
0
1
0
July
0.0
0
0
0
0
0
August
0.3
0
1
0
0
1
September
1.4
2
1
2
1
3
October
1.8
3
0
1
1
2
November
6.8
4
3
13
3
December
5.9
9
2
2
10
Average
3.1
2.7
3.8
1.9
2.5
2.8
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
6.1
5
6
5
6
4
February
5.7
6
5
5
6
4
March
5.8
6
6
5
5
6
April
5.2
5
5
5
5
5
May
5.4
5
6
5
5
5
June
5.2
5
5
5
5
5
July
5.2
5
5
5
5
5
August
5.3
5
5
5
5
6
September
5.2
5
5
5
5
5
October
4.7
4
5
4
5
5
November
5.9
6
6
5
4
December
5.4
5
5
6
5
Average
5.4
5.2
5.2
5.0
5.2
5.1
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
280°
271°
297°
264°
254°
February
282°
304°
318°
283°
325°
March
285°
287°
297°
323°
308°
April
326°
317°
309°
338°
312°
May
325°
323°
311°
329°
333°
June
344°
335°
328°
334°
323°
July
338°
340°
339°
346°
346°
August
343°
344°
343°
349°
348°
September
331°
347°
330°
342°
328°
October
307°
326°
344°
322°
303°
November
301°
292°
262°
296°
December
283°
242°
293°
255°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.