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
January
98.9
100
100
100
99
February
99.2
100
100
100
100
March
99.1
100
100
99
100
April
99.9
100
100
100
100
May
98.2
100
100
98
100
June
98.3
100
99
100
99
July
73.1
42
75
73
87
August
65.5
44
80
65
78
September
97.8
99
100
99
94
October
99.7
100
100
100
100
November
100.0
100
100
100
100
December
99.9
100
100
100
100
Average
93.7
89.5
95.7
93.8
96.2
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
January
27.5
29.1
27.3
27.1
27.8
February
27.9
28.8
28.8
28.0
28.0
March
30.0
30.6
30.3
30.5
31.8
April
31.6
31.6
31.8
31.8
31.6
May
32.7
33.0
33.7
33.6
32.2
June
32.0
32.8
32.2
31.8
30.8
July
28.3
28.1
28.3
27.5
28.6
August
27.2
26.6
28.3
26.3
27.8
September
29.6
29.8
30.8
29.0
30.0
October
30.6
31.1
30.6
30.1
30.0
November
30.6
31.0
30.8
30.1
31.5
December
28.9
29.1
29.3
29.6
28.5
Average
29.7
30.1
30.2
29.6
29.9
Average highest temperature per day
The maximum temperature is typically observed some hours after noon.
Minimum temperatures (°C)
Month
Average
2024
2023
2022
2021
January
20.0
21.8
21.1
19.8
19.3
February
20.9
22.6
20.3
20.5
20.3
March
23.0
25.3
23.5
21.6
21.8
April
26.1
27.1
27.1
25.6
25.5
May
27.6
29.0
28.3
27.8
27.8
June
28.1
29.3
28.3
28.3
26.3
July
24.6
25.8
24.6
24.8
25.0
August
24.1
24.3
25.6
24.1
24.0
September
25.4
25.8
26.3
25.8
26.1
October
24.2
25.1
25.1
23.3
24.1
November
23.5
23.6
24.3
22.8
23.0
December
21.5
20.8
22.0
21.5
21.6
Average
24.1
25.0
24.7
23.9
23.7
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
January
0.0
0
1
0
0
February
0.0
0
0
0
0
March
0.1
0
0
0
0
April
0.0
0
0
0
0
May
2.5
2
0
0
0
June
2.4
2
4
1
3
July
25.0
50
25
27
15
August
31.7
43
24
37
25
September
3.2
1
0
3
10
October
0.7
0
2
0
0
November
0.0
0
0
0
0
December
0.1
0
0
0
0
Average
5.9
8.9
4.9
6.2
4.6
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
January
8.8
9
9
9
9
February
8.1
8
7
9
7
March
7.5
9
7
8
7
April
8.4
9
9
8
8
May
9.2
9
10
10
9
June
9.8
11
9
10
10
July
8.2
7
9
8
9
August
6.8
6
8
7
8
September
8.3
8
8
8
8
October
7.2
7
7
7
8
November
6.9
6
6
6
7
December
10.1
11
9
10
8
Average
8.3
8.1
8.2
8.2
8.2
Average wind speed
Excluding wind gusts. Only observations between sunrise and sunset are taken into account.
Prevailing wind direction
Month
2024
2023
2022
2021
January
076°
107°
080°
050°
February
167°
163°
072°
147°
March
178°
170°
171°
175°
April
181°
183°
184°
182°
May
186°
188°
188°
187°
June
190°
192°
190°
188°
July
177°
189°
183°
180°
August
163°
181°
171°
183°
September
189°
185°
188°
189°
October
180°
165°
178°
183°
November
143°
153°
150°
138°
December
022°
049°
037°
089°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.