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
75.9
81
83
64
74
85
February
87.7
90
79
95
74
97
March
90.4
93
86
94
89
95
April
95.4
98
92
97
96
100
May
96.3
96
96
100
95
100
June
95.7
95
98
99
93
95
July
95.0
97
97
98
91
96
August
96.5
97
95
96
94
99
September
94.8
95
95
93
98
October
93.2
83
98
95
94
November
81.3
91
82
78
84
December
77.8
73
71
75
81
Average
91.8
94.2
90.4
93.3
88.8
94.8
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
5.2
5
7
6
4
8
February
7.3
10
8
9
6
9
March
10.2
12
9
11
10
10
April
14.1
15
13
13
11
17
May
19.0
21
19
20
16
18
June
23.7
21
25
24
24
23
July
24.0
24
24
25
24
22
August
24.5
25
23
27
21
27
September
20.2
24
19
20
21
October
15.6
16
18
15
14
November
9.1
9
10
8
11
December
6.2
7
2
6
7
Average
15.2
16.6
15.2
15.7
13.7
15.4
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
1.0
1
3
2
0
3
February
1.1
5
1
3
-2
4
March
2.1
4
3
0
2
2
April
3.9
7
3
3
1
4
May
7.9
11
7
8
7
6
June
12.5
12
12
11
14
13
July
13.5
14
14
13
15
12
August
13.9
15
14
14
13
15
September
10.2
13
10
11
9
October
8.6
10
10
8
9
November
4.0
4
4
4
5
December
2.0
3
-4
1
3
Average
6.9
8.4
7.3
6.4
6.1
6.9
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
27.0
25
27
36
35
18
February
23.5
21
21
28
30
30
March
18.5
17
33
3
16
12
April
12.7
22
13
16
18
2
May
10.4
12
9
6
22
7
June
9.9
16
8
7
10
11
July
12.8
17
17
9
12
17
August
11.1
10
19
5
17
8
September
12.2
5
24
6
9
October
17.3
26
7
11
20
November
18.7
28
12
21
11
December
29.1
41
22
28
26
Average
15.4
16.5
18.6
12.8
17.4
13.2
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
9.1
10
10
10
7
9
February
9.6
9
9
13
8
12
March
9.0
8
9
7
9
10
April
8.5
8
8
9
9
8
May
7.5
7
7
7
8
7
June
6.9
7
6
7
5
7
July
7.1
6
8
8
6
7
August
6.6
6
7
6
7
7
September
6.6
6
7
6
6
October
7.9
8
7
7
8
November
7.6
9
8
7
7
December
8.1
10
5
7
7
Average
7.7
7.5
7.8
7.6
7.2
7.8
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
244°
236°
265°
248°
230°
February
238°
263°
247°
139°
239°
March
173°
247°
096°
264°
219°
April
239°
080°
311°
302°
339°
May
107°
030°
266°
255°
300°
June
266°
344°
272°
292°
254°
July
249°
246°
287°
257°
264°
August
245°
253°
015°
271°
230°
September
193°
236°
252°
245°
October
230°
217°
217°
219°
November
233°
175°
252°
215°
December
244°
084°
234°
185°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.