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
99.5
100
99
99
100
100
February
99.6
100
100
100
100
100
March
99.6
100
100
100
100
98
April
99.1
98
99
99
100
May
99.7
100
99
100
100
June
99.4
100
100
99
98
July
99.1
100
99
99
98
August
98.6
100
99
100
99
September
99.2
100
100
99
98
October
98.7
99
99
100
99
November
98.4
98
100
99
96
December
97.4
100
99
100
100
Average
99.1
100.0
99.3
99.3
99.5
98.8
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
31.4
33
31
32
32
31
February
31.6
33
33
32
33
32
March
31.7
32
32
31
32
32
April
31.5
33
31
31
31
May
30.6
33
30
31
31
June
29.4
31
29
30
26
July
30.1
31
29
30
30
August
29.6
31
28
30
30
September
30.0
31
30
30
30
October
29.7
31
29
30
30
November
29.5
31
29
30
29
December
30.3
30
31
31
31
Average
30.7
32.4
31.3
30.0
30.7
30.2
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
23.9
27
25
25
23
24
February
23.2
27
24
25
24
24
March
23.9
28
26
25
23
21
April
25.0
27
25
24
25
May
23.4
28
26
25
25
June
23.6
27
25
24
20
July
24.8
27
25
23
26
August
24.1
28
22
25
22
September
24.9
28
25
25
26
October
23.9
28
25
25
24
November
24.0
27
25
24
24
December
24.0
26
25
25
24
Average
24.3
27.1
26.6
24.6
24.1
23.7
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
0.9
0
1
0
2
0
February
0.0
0
0
0
0
0
March
0.3
0
0
2
1
0
April
2.5
0
3
4
2
May
5.1
3
8
5
6
June
6.2
4
6
7
11
July
8.7
6
11
10
9
August
7.6
6
11
8
6
September
4.5
5
5
5
4
October
6.8
3
9
2
9
November
9.6
11
16
8
14
December
2.8
2
4
3
4
Average
4.1
3.3
6.1
4.5
5.5
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
8.3
9
7
8
8
9
February
9.5
10
11
9
9
10
March
8.7
9
9
9
8
10
April
7.2
8
7
6
7
May
5.9
8
5
6
6
June
5.0
6
5
5
5
July
5.3
6
5
5
5
August
5.0
6
5
5
5
September
4.9
6
5
5
5
October
5.0
6
5
5
5
November
5.1
5
5
6
5
December
6.5
6
6
6
6
Average
6.8
9.4
6.9
6.1
6.1
6.6
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
356°
005°
349°
357°
007°
February
003°
359°
357°
003°
003°
March
082°
046°
357°
009°
002°
April
122°
099°
004°
148°
May
026°
165°
013°
166°
June
164°
206°
312°
217°
July
345°
225°
341°
296°
August
185°
189°
205°
222°
September
194°
207°
196°
193°
October
171°
192°
205°
208°
November
237°
217°
328°
239°
December
346°
046°
342°
335°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.