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
87.9
100
100
74
0
100
February
84.2
100
80
100
40
March
87.5
100
83
60
April
100.0
100
0
100
May
100.0
100
100
100
100
June
89.2
100
60
100
80
July
96.4
100
100
100
67
August
97.7
100
100
83
100
September
97.5
100
100
100
October
89.4
100
100
100
50
November
95.3
100
83
75
100
December
88.0
100
50
100
0
Average
92.1
100.0
100.0
81.4
93.0
69.4
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
24.8
24
29
24
28
23
February
23.3
23
25
27
23
March
21.3
22
20
22
April
19.6
18
15
19
May
13.2
10
10
17
13
June
12.0
10
7
20
16
July
9.4
10
7
10
10
August
12.0
14
9
14
8
September
15.4
14
8
16
October
19.3
20
21
15
23
November
21.9
23
21
19
21
December
22.9
20
25
18
28
Average
18.4
23.0
17.2
18.9
16.1
18.6
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
23.3
23
28
22
28
21
February
22.7
22
24
27
23
March
20.8
22
19
20
April
19.0
18
15
19
May
13.0
10
10
17
13
June
11.7
10
4
20
16
July
9.2
9
7
10
10
August
11.6
13
7
14
8
September
14.4
13
8
16
October
18.2
18
21
15
23
November
21.0
22
18
19
21
December
22.2
20
19
17
28
Average
17.8
22.3
16.2
17.4
16.0
18.2
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
0.0
0
0
0
0
0
February
0.0
0
0
0
0
March
3.1
0
8
0
April
0.0
0
0
0
May
0.0
0
0
0
0
June
0.0
0
0
0
0
July
0.0
0
0
0
0
August
0.0
0
0
0
0
September
2.4
6
0
0
October
0.0
0
0
0
0
November
2.3
0
0
25
0
December
0.0
0
0
0
0
Average
0.5
1.2
1.2
2.3
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
2021
2020
January
8.5
9
9
8
5
13
February
5.7
7
5
7
6
March
6.5
6
7
7
April
5.0
3
0
5
May
4.4
4
5
6
5
June
5.7
4
4
11
4
July
5.8
4
3
8
4
August
6.8
8
3
8
9
September
8.7
9
6
10
October
8.7
9
8
10
7
November
7.7
8
10
7
7
December
8.5
11
16
8
2
Average
7.1
7.6
7.8
6.5
7.9
6.5
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
071°
339°
087°
360°
160°
February
122°
097°
311°
084°
March
096°
014°
096°
April
090°
360°
153°
May
111°
142°
310°
360°
June
090°
145°
311°
078°
July
279°
128°
360°
127°
August
004°
151°
349°
307°
September
290°
116°
110°
October
131°
116°
282°
344°
November
225°
065°
164°
349°
December
100°
218°
077°
045°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.