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
90.2
93
88
February
86.0
82
91
March
74.9
71
79
April
85.5
84
87
May
64.5
65
June
80.6
81
July
90.7
91
August
91.5
92
91
September
91.6
83
96
October
84.4
94
80
November
89.7
91
90
December
89.9
90
90
Average
85.0
81.5
84.6
89.0
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
6.4
6
7
February
7.0
6
8
March
6.1
7
6
April
8.1
8
9
May
10.0
10
June
14.9
15
July
16.0
16
August
15.9
16
16
September
15.0
16
14
October
11.2
10
12
November
9.0
8
10
December
6.4
7
6
Average
9.5
6.5
10.6
11.6
Average highest temperature per day
The maximum temperature is typically observed some hours after noon.
Minimum temperatures (°C)
Month
Average
2024
2023
2022
January
3.8
3
5
February
4.7
4
6
March
3.6
4
3
April
5.0
5
5
May
7.0
7
June
11.5
12
July
12.5
13
August
13.1
13
14
September
12.3
13
12
October
9.1
8
10
November
6.9
6
8
December
3.8
4
4
Average
7.0
4.0
7.7
9.4
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
January
17.6
14
21
February
21.9
21
23
March
24.2
21
28
April
17.0
23
11
May
9.1
9
June
4.3
4
July
15.0
15
August
8.5
8
9
September
9.9
9
11
October
14.7
16
14
November
15.4
17
15
December
24.1
18
27
Average
16.3
20.4
13.5
15.0
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
27.7
30
25
February
27.1
25
29
March
23.6
26
21
April
20.4
23
18
May
18.2
18
June
15.7
16
July
17.3
17
August
17.3
18
17
September
21.3
19
23
October
24.4
26
24
November
28.9
21
31
December
23.3
26
22
Average
23.3
25.3
20.1
24.4
Average wind speed
Excluding wind gusts. Only observations between sunrise and sunset are taken into account.
Prevailing wind direction
Month
2024
2023
2022
January
241°
229°
February
217°
280°
March
153°
009°
April
181°
140°
May
271°
June
029°
July
260°
August
317°
203°
September
207°
059°
October
176°
201°
November
115°
155°
December
202°
130°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.