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
88.7
91
78
82
93
87
February
90.7
92
99
85
92
83
March
96.2
94
100
98
95
94
April
97.8
98
98
100
100
97
May
97.9
96
99
97
100
94
June
98.6
100
95
99
98
100
July
99.4
100
99
100
100
100
August
98.3
95
98
97
100
99
September
98.1
100
97
98
97
October
96.3
98
99
94
88
November
92.8
97
97
90
99
December
90.5
98
84
87
92
Average
95.4
95.5
96.4
94.6
95.3
93.7
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
27.9
29
26
27
29
28
February
27.8
28
29
27
28
27
March
28.3
29
28
29
28
28
April
27.4
28
27
29
27
27
May
25.9
28
27
25
27
24
June
25.6
27
25
25
26
26
July
25.7
27
27
26
25
26
August
27.7
28
29
27
28
27
September
30.6
32
29
33
31
October
29.8
31
29
29
30
November
28.2
31
28
28
29
December
28.1
30
27
27
28
Average
27.7
27.9
28.4
27.3
27.7
27.5
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
19.4
20
19
19
20
19
February
19.4
20
20
19
19
20
March
19.7
21
20
20
19
19
April
18.6
20
18
19
17
18
May
16.2
18
16
15
17
15
June
15.3
16
14
15
15
16
July
14.4
16
15
15
13
15
August
16.3
16
18
16
17
16
September
19.1
20
18
21
19
October
19.8
21
19
19
20
November
19.0
21
17
19
19
December
19.5
21
19
19
19
Average
18.0
18.1
18.4
17.5
17.9
17.8
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
7.8
9
15
12
4
6
February
8.1
6
4
12
9
16
March
4.2
10
3
2
4
4
April
2.4
1
4
1
0
2
May
1.0
0
1
1
0
4
June
0.5
0
1
2
1
0
July
0.0
0
0
0
0
0
August
0.6
0
1
1
1
1
September
2.0
2
3
0
2
October
3.0
2
5
3
3
November
6.4
3
3
7
3
December
6.8
4
11
11
6
Average
3.6
3.5
3.4
4.3
3.3
4.0
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
2021
2020
January
7.3
7
8
7
7
7
February
7.2
7
7
7
7
8
March
7.3
7
8
8
7
8
April
7.5
8
8
8
7
7
May
7.5
8
7
8
7
7
June
8.1
8
7
8
8
9
July
8.7
8
8
9
8
9
August
9.1
9
9
9
9
9
September
9.2
9
9
9
8
October
8.6
9
9
9
9
November
8.0
8
8
8
8
December
7.5
8
8
8
7
Average
8.0
7.8
7.9
8.1
7.8
7.9
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
344°
356°
001°
038°
354°
February
014°
022°
014°
020°
360°
March
012°
040°
037°
016°
042°
April
047°
032°
046°
062°
051°
May
048°
058°
041°
044°
055°
June
047°
052°
063°
060°
045°
July
051°
048°
049°
065°
046°
August
054°
031°
058°
053°
058°
September
033°
040°
036°
054°
October
013°
036°
029°
030°
November
015°
028°
013°
038°
December
011°
005°
018°
023°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.