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
2025
2024
2023
2022
2021
January
68.9
91
60
63
65
83
February
68.4
100
60
64
36
89
March
98.7
100
100
96
98
97
April
97.3
99
99
84
100
May
96.0
96
97
95
92
96
June
93.1
90
95
92
96
94
July
87.8
87
89
82
89
August
76.9
73
83
64
78
September
84.1
89
84
72
94
October
91.0
89
95
88
100
November
94.8
96
93
96
97
December
80.9
69
80
91
82
Average
88.9
95.0
84.9
87.0
84.5
91.4
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
2025
2024
2023
2022
2021
January
33.2
33.6
35.6
33.8
31.3
31.3
February
33.4
33.2
36.0
34.7
31.8
31.6
March
33.4
34.2
35.7
32.2
32.8
31.8
April
32.0
34.1
31.1
29.8
34.2
May
31.1
31.1
32.2
32.8
29.1
30.8
June
29.4
29.6
30.8
29.8
28.8
29.5
July
28.1
28.5
29.5
27.8
28.0
August
27.3
28.3
28.6
26.3
27.3
September
28.1
30.1
29.1
27.0
27.8
October
29.8
30.8
31.6
30.1
29.3
November
32.3
34.0
33.0
33.2
29.8
December
32.9
33.6
35.1
32.5
30.8
Average
30.8
32.4
32.4
31.7
30.0
30.1
Average highest temperature per day
The maximum temperature is typically observed some hours after noon.
Minimum temperatures (°C)
Month
Average
2025
2024
2023
2022
2021
January
25.1
26.3
25.1
21.8
27.1
25.3
February
27.0
28.6
25.8
24.5
28.6
27.8
March
26.5
29.1
25.8
23.8
26.8
27.3
April
26.1
26.0
25.1
24.6
26.8
May
25.8
26.3
25.1
25.1
25.0
26.5
June
24.5
24.8
24.5
22.8
24.6
25.1
July
24.3
24.1
24.3
24.8
24.1
August
23.6
23.1
23.3
23.3
23.8
September
23.6
23.6
23.3
22.3
25.0
October
24.3
23.8
24.0
23.8
26.0
November
25.1
25.0
25.0
24.1
25.6
December
25.1
24.3
24.6
24.3
27.3
Average
25.3
27.0
24.6
23.9
24.8
25.8
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2025
2024
2023
2022
2021
January
0.0
0
0
0
0
0
February
0.0
0
0
0
0
0
March
0.2
0
0
1
0
0
April
0.9
0
2
3
1
May
0.4
0
1
0
2
1
June
4.2
3
3
8
2
0
July
2.6
3
4
0
1
August
3.9
4
4
8
6
September
3.7
3
5
1
2
October
2.5
5
1
1
0
November
0.0
0
0
0
0
December
0.0
0
0
0
0
Average
1.4
0.5
1.4
2.3
1.3
1.0
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
2025
2024
2023
2022
2021
January
5.0
5
4
5
5
6
February
5.0
5
4
5
5
6
March
5.7
6
5
5
6
6
April
6.8
7
6
6
8
May
6.5
5
8
5
5
8
June
6.0
5
7
5
5
8
July
6.4
7
5
7
8
August
6.4
8
5
6
7
September
5.6
7
4
5
6
October
4.7
5
4
4
4
November
4.4
4
4
4
4
December
4.8
4
4
5
5
Average
5.9
5.2
5.9
4.6
5.1
6.5
Average wind speed
Excluding wind gusts. Only observations between sunrise and sunset are taken into account.
Prevailing wind direction
Month
2025
2024
2023
2022
2021
January
267°
039°
049°
062°
258°
February
236°
191°
001°
105°
203°
March
232°
211°
207°
224°
219°
April
210°
212°
192°
205°
May
218°
213°
194°
202°
205°
June
224°
219°
223°
237°
197°
July
243°
221°
229°
230°
August
232°
218°
222°
238°
September
236°
224°
217°
209°
October
202°
195°
207°
194°
November
091°
193°
146°
231°
December
067°
039°
360°
094°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.