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
January
94.4
85
98
February
90.8
90
91
March
78.2
91
72
April
85.0
90
83
May
87.5
84
94
June
91.9
92
92
July
97.2
97
97
August
97.5
96
100
September
96.1
99
94
October
93.9
94
94
November
96.8
93
98
December
88.6
88
89
Average
91.5
89.1
90.2
95.0
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
January
11.7
11
12
February
11.7
14
10
March
13.0
13
13
April
17.4
19
16
May
18.3
18
20
June
23.4
23
23
July
25.7
27
25
August
28.6
29
29
September
24.9
25
25
October
20.7
22
20
November
18.5
20
17
December
15.3
15
15
Average
18.5
14.2
19.1
22.1
Average highest temperature per day
The maximum temperature is typically observed some hours after noon.
Minimum temperatures (°C)
Month
Average
2024
2023
2022
January
5.8
6
6
February
6.0
8
4
March
7.9
8
8
April
11.6
13
10
May
13.3
13
13
June
19.2
19
19
July
20.9
21
21
August
24.2
24
25
September
19.5
21
18
October
15.4
16
15
November
12.0
12
12
December
9.4
9
10
Average
13.1
8.6
13.6
17.2
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
January
20.9
37
14
February
29.2
21
33
March
23.1
16
27
April
16.5
5
23
May
17.6
20
14
June
14.2
15
14
July
11.0
10
12
August
6.1
6
6
September
14.0
13
15
October
21.0
11
26
November
18.6
22
17
December
20.3
20
21
Average
17.3
18.8
17.6
15.4
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
January
5.2
6
5
February
7.3
5
8
March
7.1
7
7
April
7.4
7
8
May
6.4
6
7
June
5.9
6
6
July
5.7
6
6
August
5.3
6
5
September
6.2
6
6
October
6.2
6
6
November
5.9
7
5
December
5.4
7
5
Average
6.2
6.5
6.4
5.7
Average wind speed
Excluding wind gusts. Only observations between sunrise and sunset are taken into account.
Prevailing wind direction
Month
2024
2023
2022
January
202°
179°
February
220°
205°
March
297°
220°
April
009°
221°
May
221°
222°
June
218°
210°
July
207°
200°
August
209°
214°
September
202°
187°
October
226°
191°
November
178°
180°
December
208°
183°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.