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
93.0
94
92
92
90
96
February
92.4
98
93
98
87
85
March
94.7
100
90
96
97
96
April
97.9
99
93
100
99
May
99.4
100
99
100
99
June
96.0
99
92
100
95
July
98.6
98
99
100
96
August
99.3
99
100
99
99
September
96.8
94
99
98
100
October
98.7
99
99
99
100
November
98.6
99
97
99
100
December
94.5
88
97
98
100
Average
96.5
97.2
95.6
96.7
97.4
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
25.8
26
25
25
25
27
February
26.1
29
26
26
26
26
March
26.6
29
26
26
26
26
April
25.3
27
24
25
26
May
23.5
26
23
24
22
June
20.0
23
20
21
18
July
20.5
21
20
19
19
August
24.1
24
25
24
23
September
26.6
29
27
27
24
October
28.1
29
29
28
22
November
28.3
29
27
29
25
December
27.3
28
27
28
23
Average
25.6
28.0
26.1
24.3
25.1
23.5
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
17.1
16
17
17
20
17
February
16.5
16
17
16
17
16
March
15.3
16
15
16
14
15
April
13.7
13
15
13
14
May
9.9
11
10
8
10
June
8.4
8
8
8
11
July
7.8
7
9
8
9
August
10.8
9
10
10
16
September
13.0
14
12
13
17
October
15.7
16
15
16
19
November
17.0
17
16
18
21
December
17.1
18
16
18
21
Average
14.1
16.0
13.6
12.7
13.5
14.5
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
6.3
5
10
7
8
2
February
5.5
2
5
3
11
11
March
3.0
1
4
2
2
5
April
1.5
1
5
0
1
May
0.2
0
1
0
0
June
1.7
0
6
0
0
July
0.3
1
0
0
0
August
0.3
1
0
0
0
September
0.5
0
0
0
0
October
0.6
1
0
2
0
November
1.8
0
5
0
3
December
4.6
12
1
2
0
Average
2.5
2.7
2.9
2.2
1.7
2.8
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
6.1
6
6
6
7
6
February
6.4
6
6
5
7
7
March
5.7
5
6
6
5
5
April
6.1
6
6
6
7
May
5.9
6
6
5
7
June
6.5
5
8
6
6
July
6.6
6
6
8
8
August
7.6
7
7
8
8
September
8.2
8
8
9
8
October
8.4
7
10
8
7
November
7.8
7
7
9
7
December
7.5
7
7
9
7
Average
6.9
5.9
6.5
6.6
7.4
6.7
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
113°
076°
067°
011°
118°
February
179°
344°
142°
022°
066°
March
136°
138°
120°
114°
121°
April
105°
098°
118°
105°
May
073°
109°
080°
123°
June
091°
116°
110°
118°
July
091°
088°
115°
111°
August
090°
082°
091°
104°
September
065°
082°
077°
110°
October
061°
079°
085°
077°
November
065°
066°
068°
046°
December
051°
053°
062°
058°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.