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
99.7
100
100
100
100
99
February
99.7
100
100
100
99
100
March
99.6
100
100
99
99
100
April
99.5
99
100
98
100
May
98.1
97
99
97
100
June
96.3
89
98
94
98
July
98.1
95
99
97
99
August
97.2
96
96
95
96
September
95.4
94
98
95
95
October
94.2
96
94
91
95
November
96.1
91
95
93
99
December
99.3
99
99
100
100
Average
98.0
100.0
96.2
97.9
96.2
98.3
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
2025
2024
2023
2022
2021
January
32.7
31.8
33.8
32.5
32.6
32.3
February
33.6
33.3
34.2
33.1
33.2
33.3
March
34.6
35.5
35.8
33.7
34.1
33.7
April
35.0
35.7
34.7
34.7
33.5
May
33.1
34.2
35.5
32.1
32.6
June
31.2
30.3
32.7
29.6
31.6
July
31.7
31.5
33.2
31.0
31.6
August
31.5
31.8
32.7
31.0
30.5
September
31.1
30.1
33.2
30.1
30.8
October
30.3
30.8
31.1
30.3
30.8
November
30.5
28.3
31.8
29.8
31.0
December
32.1
31.3
32.7
31.3
32.2
Average
32.4
33.5
32.3
33.1
31.6
32.0
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
21.3
22.6
22.5
21.1
18.8
19.1
February
22.2
23.3
21.3
23.6
21.3
20.6
March
22.3
22.8
21.8
21.6
21.6
21.3
April
23.1
24.5
21.8
22.5
22.5
May
23.6
24.5
24.3
22.3
22.6
June
23.1
23.6
23.8
23.1
21.1
July
22.8
22.1
24.1
23.3
22.8
August
22.7
23.1
23.0
22.3
22.1
September
22.7
23.3
22.6
23.1
21.3
October
22.3
22.8
22.6
22.5
21.3
November
21.9
22.6
22.8
22.8
19.6
December
22.2
22.6
21.8
21.6
21.6
Average
22.5
22.9
22.9
22.7
22.1
21.3
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2025
2024
2023
2022
2021
January
0.1
0
0
0
0
0
February
0.0
0
0
0
0
0
March
0.0
0
0
1
0
0
April
0.6
1
0
1
1
May
6.3
5
1
10
2
June
9.3
20
3
21
5
July
4.2
6
2
8
4
August
6.3
4
4
8
13
September
7.3
12
3
13
4
October
12.4
9
15
9
5
November
9.3
28
8
13
2
December
1.0
4
1
0
1
Average
4.3
0.0
7.5
3.2
7.3
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
2025
2024
2023
2022
2021
January
12.8
11
13
13
12
13
February
14.6
14
12
18
15
13
March
13.2
11
11
11
12
15
April
10.0
12
10
9
10
May
6.9
6
10
5
8
June
6.0
5
6
5
6
July
7.5
6
9
6
8
August
6.5
5
7
6
6
September
5.4
5
6
5
6
October
5.1
5
5
5
5
November
6.3
5
6
6
7
December
10.2
8
9
11
9
Average
9.0
11.8
7.6
9.0
7.8
8.7
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
072°
077°
077°
074°
079°
February
076°
077°
076°
079°
084°
March
072°
068°
075°
077°
085°
April
071°
074°
080°
091°
May
276°
073°
239°
092°
June
252°
107°
223°
102°
July
095°
086°
089°
093°
August
089°
087°
072°
118°
September
274°
098°
255°
174°
October
255°
173°
257°
269°
November
225°
077°
072°
088°
December
077°
079°
078°
083°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.