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
99.3
100
99
99
100
100
February
99.0
98
98
99
100
100
March
99.5
98
100
100
100
100
April
98.5
95
100
99
99
100
May
98.2
99
99
99
97
97
June
97.5
99
98
96
97
98
July
97.8
97
98
98
97
99
August
97.5
99
99
99
96
98
September
97.4
98
98
96
99
97
October
98.2
100
99
97
98
98
November
98.2
100
96
99
98
December
98.4
100
95
99
98
Average
98.3
98.1
98.9
97.8
98.3
98.4
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
2024
2023
2022
2021
2020
January
30.1
34
29
29
30
30
February
30.0
33
29
29
30
31
March
30.8
33
30
30
30
31
April
31.1
33
31
30
30
32
May
30.3
31
31
30
30
31
June
30.4
32
32
30
31
30
July
31.2
32
32
31
31
32
August
32.3
35
34
32
32
32
September
33.1
34
35
33
32
33
October
32.9
35
35
32
32
33
November
31.3
33
31
31
31
December
30.0
33
29
30
30
Average
31.2
33.0
31.9
30.4
30.6
31.1
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
21.7
23
22
22
22
22
February
22.0
23
23
22
22
21
March
21.9
23
22
22
22
22
April
22.7
24
23
23
23
23
May
23.2
25
24
23
24
24
June
23.2
24
24
23
22
23
July
22.7
22
24
23
23
23
August
23.2
24
24
23
23
24
September
23.4
24
24
24
23
23
October
23.0
24
24
21
24
23
November
22.8
24
22
23
23
December
22.5
23
20
23
23
Average
22.7
23.5
23.3
22.3
22.7
22.7
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
14.1
12
20
16
17
11
February
14.9
5
22
23
13
6
March
13.0
6
11
20
20
16
April
12.0
7
17
17
18
10
May
21.2
21
19
21
28
15
June
16.8
14
12
19
15
17
July
12.0
11
10
14
12
9
August
8.1
4
3
10
10
9
September
3.3
3
2
3
3
4
October
4.6
6
2
7
7
2
November
11.0
4
13
14
13
December
20.7
8
24
31
28
Average
12.4
8.9
10.8
15.2
15.6
11.5
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
8
8
8
8
9
February
9.2
10
9
9
10
10
March
8.7
8
8
9
9
9
April
8.5
8
8
8
8
9
May
7.6
7
7
8
7
8
June
6.0
6
6
6
6
5
July
5.7
5
6
6
6
6
August
5.8
6
6
5
5
6
September
6.2
6
6
6
6
6
October
6.7
7
7
6
6
6
November
6.7
8
6
7
6
December
7.3
7
6
7
6
Average
7.2
7.0
7.1
6.8
7.0
7.1
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
055°
051°
045°
052°
060°
February
057°
042°
047°
057°
055°
March
046°
056°
063°
052°
045°
April
052°
057°
057°
052°
047°
May
064°
064°
062°
060°
063°
June
075°
074°
059°
063°
070°
July
080°
069°
060°
049°
072°
August
085°
067°
056°
045°
081°
September
079°
071°
066°
064°
070°
October
079°
063°
072°
063°
070°
November
066°
068°
056°
078°
December
058°
049°
064°
065°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.