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
81.6
81
88
73
91
67
February
71.7
69
63
76
74
67
March
86.7
80
90
97
91
89
April
96.3
94
99
96
96
97
May
98.3
97
98
99
99
100
June
98.4
97
99
99
100
98
July
99.6
100
99
100
100
100
August
99.7
100
100
100
100
99
September
97.6
100
100
96
98
October
85.3
90
92
93
77
November
86.8
96
82
83
86
December
80.4
82
81
80
78
Average
91.9
91.3
93.3
93.1
93.4
90.0
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
7.5
8
9
8
7
9
February
10.0
12
9
10
11
12
March
13.3
14
14
13
13
13
April
17.2
18
16
16
15
18
May
21.3
21
22
23
20
22
June
26.8
26
26
28
27
25
July
29.0
30
29
31
29
28
August
29.3
31
29
30
28
29
September
24.3
27
24
25
25
October
19.3
21
21
18
17
November
13.1
13
14
13
13
December
8.4
10
8
8
9
Average
18.5
20.0
18.7
19.1
17.8
18.1
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
0.6
1
3
0
0
0
February
2.8
5
1
2
4
4
March
5.2
8
6
3
3
5
April
9.1
10
8
8
8
9
May
14.0
14
14
16
12
14
June
18.9
19
18
20
19
18
July
20.5
22
20
21
20
20
August
20.4
22
20
20
19
20
September
15.8
18
15
16
16
October
11.6
14
13
10
10
November
6.5
5
7
7
5
December
2.0
3
3
1
3
Average
10.8
12.6
10.9
10.9
9.9
10.3
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
4.7
7
8
1
10
5
February
7.5
17
0
4
6
1
March
7.2
21
4
3
1
6
April
7.4
9
7
6
11
3
May
9.0
11
15
5
10
2
June
2.4
3
2
4
1
6
July
1.8
1
2
1
5
1
August
2.4
3
5
3
1
3
September
4.0
2
4
3
2
October
4.5
6
1
2
9
November
9.7
6
6
13
2
December
9.8
5
27
6
18
Average
5.6
8.2
5.2
4.3
5.4
4.4
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
5.4
5
6
4
6
4
February
5.9
5
6
5
5
5
March
6.4
7
6
6
6
8
April
7.1
7
7
7
7
7
May
6.9
6
8
7
7
7
June
6.3
7
6
6
6
6
July
6.1
6
6
6
6
6
August
6.1
5
6
6
6
6
September
6.3
6
7
6
6
October
5.5
6
5
6
6
November
6.0
6
6
7
4
December
5.2
4
6
5
6
Average
6.2
6.1
6.0
6.0
6.1
6.0
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
036°
045°
359°
036°
012°
February
067°
074°
075°
084°
078°
March
073°
105°
095°
112°
085°
April
089°
094°
108°
113°
104°
May
095°
069°
098°
122°
109°
June
105°
108°
124°
137°
136°
July
110°
092°
116°
107°
108°
August
110°
092°
107°
100°
094°
September
083°
088°
098°
098°
October
075°
099°
073°
108°
November
345°
027°
043°
036°
December
332°
033°
011°
040°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.