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
99.7
100
100
100
100
100
February
99.5
100
100
100
100
100
March
99.4
100
100
100
100
100
April
99.6
99
100
100
100
100
May
99.9
100
100
100
100
100
June
100.0
100
100
100
100
100
July
100.0
100
100
100
100
100
August
100.0
100
100
100
100
100
September
100.0
100
100
100
100
October
99.7
100
99
100
99
November
99.9
100
100
100
100
December
99.9
100
100
100
100
Average
99.8
99.8
99.9
99.8
100.0
99.9
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
2021
2020
January
15.3
17
17
14
18
14
February
16.1
18
15
16
17
16
March
17.4
20
18
14
17
18
April
20.5
22
20
21
21
19
May
23.9
24
22
24
25
25
June
27.7
30
26
28
28
27
July
29.9
31
32
29
30
29
August
29.7
31
30
29
31
30
September
27.5
28
27
27
29
October
23.9
25
23
23
26
November
21.2
24
21
21
19
December
17.8
19
20
17
18
Average
22.7
24.0
22.8
22.2
22.8
22.4
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
9.3
12
10
8
11
9
February
9.4
10
9
9
9
10
March
10.2
11
11
8
10
11
April
12.4
15
12
12
13
12
May
15.7
16
15
15
16
16
June
20.1
22
19
21
19
19
July
23.3
25
24
23
24
22
August
23.3
24
23
23
24
23
September
20.5
21
20
21
22
October
17.3
18
17
17
18
November
14.7
16
14
15
15
December
11.5
13
13
11
12
Average
15.7
16.7
15.8
15.3
15.7
15.6
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
8.6
8
5
15
5
12
February
6.0
4
6
8
6
5
March
5.1
1
4
13
5
4
April
1.4
0
4
0
1
4
May
1.2
1
5
0
0
1
June
0.5
0
2
1
1
0
July
0.1
0
0
0
0
0
August
0.0
0
0
0
0
0
September
0.6
1
1
0
0
October
1.0
0
1
1
3
November
3.4
4
2
1
11
December
7.3
3
2
12
6
Average
2.5
1.4
2.5
3.2
2.3
3.2
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
11.1
12
9
11
12
13
February
10.7
11
12
12
10
11
March
10.0
10
10
9
11
11
April
9.2
12
9
6
11
10
May
8.2
9
9
7
7
8
June
9.1
10
9
12
6
10
July
11.6
13
10
14
12
11
August
11.4
11
11
10
9
11
September
9.8
10
8
9
10
October
8.5
8
10
9
6
November
9.1
9
9
9
9
December
9.8
8
9
12
9
Average
9.9
10.7
9.5
9.8
9.6
10.1
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
312°
210°
319°
205°
328°
February
286°
323°
302°
304°
315°
March
288°
314°
324°
309°
315°
April
297°
289°
308°
286°
311°
May
317°
309°
334°
324°
320°
June
312°
314°
302°
329°
303°
July
305°
308°
305°
309°
308°
August
309°
309°
308°
307°
307°
September
312°
329°
318°
317°
October
322°
323°
321°
339°
November
221°
286°
304°
340°
December
252°
177°
224°
222°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.