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
22.5
14
33
41
22
16
February
44.7
39
58
58
42
38
March
46.2
63
34
51
42
59
April
58.2
50
50
66
39
75
May
71.3
66
67
67
56
88
June
51.1
60
61
44
35
38
July
25.5
14
24
13
22
25
August
30.8
41
31
38
34
13
September
30.6
14
36
25
22
October
36.4
34
58
43
25
November
19.9
7
50
16
28
December
16.7
16
28
10
29
Average
39.0
43.4
35.8
46.2
32.4
38.3
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
27.7
28
29
26
29
25
February
31.2
32
33
30
31
28
March
35.8
36
34
38
36
33
April
39.6
38
37
42
39
38
May
41.3
40
40
42
39
41
June
36.7
38
38
38
34
33
July
31.0
31
32
30
32
32
August
30.5
31
31
31
31
29
September
31.3
31
31
31
32
October
32.2
34
31
32
32
November
30.0
30
30
30
30
December
27.4
27
29
27
28
Average
33.1
34.2
32.9
33.1
32.4
31.7
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
14.2
16
15
13
16
14
February
15.8
19
16
14
15
15
March
20.7
22
20
22
20
20
April
24.7
24
23
26
23
24
May
27.9
27
26
29
26
27
June
26.5
28
28
28
24
25
July
24.9
26
26
25
25
24
August
24.2
25
24
25
25
24
September
24.1
25
24
24
24
October
21.5
22
22
21
21
November
17.2
18
15
19
15
December
14.1
16
17
15
13
Average
21.5
23.2
21.4
21.8
20.8
20.4
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
0.5
0
1
1
0
2
February
0.3
0
0
1
0
1
March
0.9
0
2
0
3
1
April
0.4
2
1
0
0
0
May
0.4
0
2
1
1
0
June
4.1
1
8
2
6
8
July
14.6
16
14
23
12
5
August
15.1
13
8
14
7
31
September
7.0
9
7
8
3
October
1.1
0
2
1
1
November
0.1
0
0
0
0
December
0.8
2
0
0
0
Average
4.1
4.3
3.9
4.5
3.3
4.6
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
3.0
3
3
4
3
3
February
3.6
4
3
4
3
4
March
3.9
4
4
4
4
4
April
4.6
4
4
4
4
4
May
5.6
5
5
6
6
5
June
6.0
6
7
6
6
5
July
5.5
6
5
5
5
4
August
5.3
5
6
5
5
6
September
3.6
4
4
4
3
October
2.5
3
3
3
3
November
2.2
2
2
3
3
December
2.6
3
3
3
2
Average
4.2
4.5
4.2
4.2
4.1
3.7
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
091°
114°
066°
083°
066°
February
153°
025°
113°
064°
076°
March
174°
339°
022°
344°
130°
April
272°
243°
240°
007°
226°
May
260°
305°
283°
250°
293°
June
263°
283°
274°
261°
257°
July
253°
268°
276°
254°
229°
August
255°
280°
267°
264°
249°
September
273°
246°
222°
282°
October
349°
052°
024°
029°
November
060°
052°
056°
057°
December
058°
055°
073°
062°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.