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
97.1
95
98
97
99
98
February
96.2
97
98
100
94
97
March
96.4
97
96
95
98
96
April
95.9
96
97
99
96
87
May
97.2
97
100
99
96
98
June
98.0
95
99
98
98
99
July
98.6
98
99
100
98
99
August
97.3
98
97
100
98
96
September
97.2
95
96
96
98
October
93.6
95
89
99
97
November
96.9
99
99
98
95
December
94.1
98
91
92
90
Average
96.7
96.5
97.3
97.2
96.9
95.9
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
12.0
13
12
12
11
13
February
14.3
16
14
15
14
16
March
16.2
17
17
15
16
16
April
18.7
19
20
19
18
18
May
22.6
22
24
25
21
24
June
27.4
26
28
29
28
26
July
30.6
30
31
33
29
31
August
30.3
32
30
32
29
30
September
26.0
27
26
26
26
October
21.7
24
23
21
20
November
16.1
17
18
15
17
December
13.0
15
12
13
12
Average
20.9
21.7
21.4
21.7
20.1
20.6
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
3.1
4
3
1
2
4
February
4.9
6
3
6
8
6
March
6.5
8
7
7
6
7
April
8.6
10
9
9
7
10
May
12.4
12
13
14
11
14
June
17.1
16
19
18
18
16
July
19.3
19
20
20
19
19
August
19.0
20
19
21
17
19
September
15.4
16
16
17
15
October
12.4
13
16
10
10
November
7.2
7
9
6
9
December
4.4
5
3
5
5
Average
11.0
11.9
11.2
11.8
10.3
11.0
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
6.7
7
3
0
7
10
February
10.4
10
8
3
23
8
March
8.3
9
2
20
2
10
April
9.3
11
6
8
12
8
May
6.6
8
9
1
8
5
June
2.9
4
3
2
3
1
July
2.0
4
1
1
4
2
August
1.7
1
2
1
4
1
September
5.6
2
7
8
8
October
10.2
7
6
9
9
November
10.8
6
12
10
11
December
9.5
4
13
6
18
Average
6.5
6.4
4.2
5.5
7.5
6.8
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
10.1
8
11
9
11
9
February
9.6
10
9
11
9
10
March
10.3
11
11
9
10
10
April
9.7
11
11
10
9
7
May
9.6
9
10
9
10
9
June
9.2
10
9
9
9
10
July
9.4
9
10
9
9
10
August
9.0
9
10
9
9
10
September
8.4
8
9
8
8
October
9.0
8
8
9
10
November
9.3
9
8
10
8
December
8.9
10
6
8
10
Average
9.4
9.6
9.6
8.9
9.2
9.2
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
321°
303°
295°
296°
012°
February
294°
334°
305°
085°
311°
March
218°
307°
108°
315°
279°
April
320°
291°
275°
315°
124°
May
291°
306°
326°
278°
287°
June
338°
244°
219°
296°
285°
July
313°
274°
272°
292°
295°
August
276°
286°
260°
285°
282°
September
119°
284°
134°
257°
October
113°
098°
338°
296°
November
299°
315°
306°
071°
December
301°
355°
294°
297°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.