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
93.0
96
97
94
87
95
February
91.5
95
87
97
88
95
March
93.8
96
95
94
93
94
April
92.3
93
97
82
98
91
May
97.0
99
93
97
98
98
June
97.2
97
98
96
99
98
July
98.1
100
94
99
98
99
August
96.7
98
96
99
96
97
September
96.6
94
97
98
99
95
October
94.0
96
89
98
90
89
November
93.8
96
88
93
91
December
91.6
94
98
92
92
Average
94.6
96.2
94.3
94.8
93.9
94.3
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
25.5
26
26
24
25
25
February
24.8
28
24
26
24
25
March
24.5
27
25
23
24
23
April
21.6
23
23
19
23
20
May
20.0
23
19
19
20
20
June
17.3
17
18
16
17
16
July
17.4
19
16
18
16
17
August
20.3
22
20
20
20
19
September
24.4
24
25
25
25
24
October
25.1
26
25
27
23
25
November
25.2
26
23
25
24
December
25.0
26
24
24
25
Average
22.5
23.2
22.7
21.8
22.0
21.9
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
15.1
15
15
14
16
16
February
15.1
16
15
15
15
15
March
14.2
16
14
14
14
13
April
11.6
13
12
10
12
11
May
9.2
12
10
8
8
8
June
5.9
6
7
4
6
5
July
5.6
6
6
7
4
4
August
7.7
9
7
8
7
6
September
11.0
11
12
12
11
10
October
12.3
12
12
14
11
14
November
13.8
15
14
14
15
December
14.9
15
15
14
16
Average
11.3
11.5
11.5
11.0
10.9
10.9
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
4.8
3
1
6
10
5
February
6.4
1
11
2
7
5
March
3.5
1
3
5
4
5
April
3.8
2
1
14
1
5
May
1.7
0
2
2
0
0
June
0.3
1
0
1
0
1
July
0.3
0
1
0
0
0
August
0.2
0
0
1
2
0
September
0.9
3
1
0
1
1
October
2.6
1
6
1
3
2
November
3.8
2
7
4
7
December
7.7
6
8
9
4
Average
3.0
1.2
2.9
3.7
3.6
3.0
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
8.5
8
8
9
9
9
February
8.1
9
7
8
8
8
March
8.0
9
9
7
8
7
April
7.9
9
8
9
7
8
May
7.4
6
9
8
7
7
June
7.9
8
9
8
8
7
July
8.4
10
10
7
8
9
August
9.9
10
9
10
10
10
September
10.0
12
11
9
10
10
October
9.9
10
10
10
10
10
November
10.2
9
10
12
10
December
9.8
10
9
10
9
Average
8.8
9.0
9.0
8.6
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
2020
January
337°
039°
036°
031°
357°
February
320°
050°
029°
072°
050°
March
342°
357°
003°
324°
319°
April
331°
298°
329°
276°
332°
May
269°
323°
270°
254°
236°
June
338°
285°
038°
261°
228°
July
274°
298°
312°
278°
235°
August
298°
335°
310°
331°
308°
September
334°
312°
332°
344°
340°
October
339°
346°
336°
343°
348°
November
339°
337°
330°
333°
December
353°
327°
340°
354°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.