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
92.7
97
91
98
79
95
February
95.1
97
89
98
98
96
March
95.6
100
98
91
93
98
April
94.6
92
97
91
100
98
May
92.3
87
98
92
94
93
June
91.7
99
88
86
92
91
July
96.0
89
99
99
95
94
August
94.0
96
96
94
97
90
September
94.4
98
87
99
99
October
91.8
90
95
90
97
November
95.0
91
93
100
98
December
94.2
95
94
99
95
Average
94.0
94.5
94.1
93.1
94.6
95.4
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
29.8
31
29
31
28
30
February
30.6
32
28
33
30
31
March
30.6
32
31
30
31
31
April
28.3
29
28
28
29
28
May
25.5
26
26
23
27
25
June
24.5
28
24
24
23
25
July
25.4
26
25
28
24
25
August
26.9
28
28
25
29
26
September
30.2
32
24
32
33
October
29.6
31
28
27
32
November
30.2
31
28
31
32
December
30.4
32
29
33
30
Average
28.4
28.9
28.6
27.5
28.5
28.9
Average highest temperature per day
The maximum temperature is typically observed some hours after noon.
Minimum temperatures (°C)
Month
Average
2024
2023
2022
2021
2020
January
20.7
21
20
22
21
20
February
20.5
22
20
22
20
19
March
20.8
22
21
21
21
20
April
18.5
21
18
18
17
18
May
16.2
18
16
14
16
15
June
15.1
18
14
14
14
17
July
14.5
15
15
17
11
15
August
15.2
16
16
14
17
15
September
18.4
19
14
20
20
October
18.8
20
17
18
19
November
19.3
21
17
20
20
December
20.4
21
21
21
19
Average
18.1
19.0
18.5
17.3
17.8
17.9
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
6.5
2
5
3
19
5
February
5.0
2
9
4
3
8
March
4.2
2
3
7
5
3
April
3.1
4
3
5
0
0
May
4.0
7
1
7
3
2
June
3.9
0
9
4
4
3
July
2.1
7
2
0
3
3
August
4.0
4
2
7
4
9
September
3.9
1
11
2
1
October
6.3
6
5
8
4
November
3.7
6
6
2
1
December
4.9
4
6
1
4
Average
4.3
3.3
4.3
5.5
4.3
3.8
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
6.4
7
6
7
6
6
February
6.7
7
6
7
6
7
March
6.9
8
7
7
7
7
April
5.9
7
6
6
6
6
May
6.2
8
5
7
5
6
June
6.7
9
6
6
6
8
July
7.2
7
7
8
6
7
August
8.0
10
7
8
8
7
September
8.3
9
8
7
9
October
8.0
9
8
7
7
November
7.8
9
7
7
8
December
6.3
7
6
7
7
Average
7.0
7.8
7.1
7.1
6.6
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
041°
073°
045°
028°
069°
February
036°
022°
024°
139°
063°
March
072°
042°
024°
350°
084°
April
036°
080°
053°
118°
093°
May
002°
071°
344°
040°
023°
June
024°
042°
058°
050°
014°
July
052°
056°
041°
073°
021°
August
029°
055°
080°
038°
055°
September
030°
099°
029°
016°
October
020°
054°
084°
096°
November
035°
151°
100°
050°
December
099°
048°
095°
072°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.