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
63.9
95
49
50
February
35.7
40
28
39
March
35.5
31
33
43
April
65.3
93
35
May
65.3
91
41
June
26.8
46
5
July
26.4
30
22
August
14.4
6
24
September
42.7
63
21
October
65.9
64
69
November
93.4
95
92
December
89.3
84
96
Average
52.1
55.7
56.8
43.9
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
15.2
15
16
15
February
15.7
16
18
14
March
20.7
20
20
23
April
22.0
22
22
May
23.4
23
24
June
23.9
24
23
July
24.8
25
25
August
24.2
23
25
September
24.5
25
24
October
22.8
23
23
November
20.3
21
20
December
17.6
17
18
Average
19.9
16.9
21.4
21.4
Average highest temperature per day
The maximum temperature is typically observed some hours after noon.
Minimum temperatures (°C)
Month
Average
2024
2023
2022
January
11.8
11
13
11
February
12.4
12
15
11
March
16.9
15
16
19
April
18.3
17
20
May
19.5
19
20
June
21.4
22
21
July
22.1
22
23
August
22.0
21
23
September
22.0
22
22
October
19.0
18
20
November
16.6
15
18
December
14.4
13
16
Average
16.4
12.9
17.7
18.8
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
January
0.5
0
0
1
February
2.0
0
0
6
March
3.6
7
2
2
April
2.9
1
5
May
4.7
2
8
June
10.9
7
16
July
10.4
9
12
August
13.2
18
8
September
12.3
12
13
October
5.5
4
7
November
0.0
0
0
December
0.0
0
0
Average
4.5
2.2
4.8
6.3
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
2.0
2
3
2
February
2.2
2
3
2
March
2.5
2
3
2
April
2.0
2
2
May
1.9
2
2
June
1.6
2
2
July
1.8
2
2
August
2.2
2
3
September
2.2
2
2
October
2.0
2
2
November
2.1
2
3
December
1.8
1
2
Average
2.0
1.9
1.9
2.2
Average wind speed
Excluding wind gusts. Only observations between sunrise and sunset are taken into account.
Prevailing wind direction
Month
2024
2023
2022
January
185°
188°
195°
February
191°
194°
198°
March
193°
198°
196°
April
188°
197°
May
196°
202°
June
191°
198°
July
196°
197°
August
195°
198°
September
195°
195°
October
197°
194°
November
185°
191°
December
185°
189°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.