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
94.7
97
97
96
92
96
February
95.7
87
99
97
96
96
March
92.8
86
87
96
97
87
April
89.5
76
93
97
93
94
May
91.2
91
93
98
96
100
June
94.6
93
93
98
91
99
July
93.1
90
84
94
100
96
August
97.7
94
99
97
100
100
September
94.9
99
92
97
94
95
October
92.9
81
95
97
100
94
November
95.8
94
98
97
98
December
96.0
87
99
97
98
Average
94.0
89.4
92.7
96.9
96.0
95.8
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
29.7
29
31
32
28
29
February
28.3
29
29
27
27
28
March
27.2
28
30
26
25
28
April
24.2
23
24
24
25
25
May
20.0
16
22
19
21
23
June
18.4
20
19
18
17
18
July
17.5
16
18
20
20
16
August
20.9
19
22
21
22
21
September
23.3
27
23
22
23
23
October
25.3
26
27
25
27
25
November
28.6
28
30
28
29
December
30.2
29
33
30
30
Average
24.3
23.1
25.1
24.3
24.2
24.4
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
17.2
17
17
18
17
18
February
16.0
18
16
15
15
16
March
14.9
18
18
12
15
16
April
11.9
12
12
9
12
12
May
7.3
4
10
6
6
7
June
4.2
7
5
2
3
4
July
3.6
2
6
4
2
2
August
5.1
4
7
5
4
5
September
8.3
9
9
6
9
8
October
11.0
14
11
9
10
11
November
14.1
14
14
13
15
December
16.5
17
17
17
15
Average
10.7
10.2
11.8
9.5
10.2
10.5
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
5.4
4
4
3
7
5
February
4.8
8
2
6
10
5
March
6.3
6
8
3
6
7
April
8.6
16
4
3
7
6
May
6.9
2
4
3
6
0
June
2.0
1
2
3
4
1
July
4.1
5
10
2
0
2
August
1.0
4
0
1
0
0
September
4.9
0
5
6
4
5
October
6.2
10
3
2
1
6
November
5.1
5
3
6
5
December
4.3
8
0
4
2
Average
5.0
5.6
4.6
2.9
4.6
3.8
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
8.2
8
7
9
8
8
February
7.9
8
9
8
7
8
March
8.2
8
8
9
8
9
April
8.0
7
7
9
9
9
May
7.2
7
6
7
8
8
June
7.9
7
8
8
8
9
July
8.3
8
8
9
8
7
August
10.0
9
9
10
10
10
September
10.4
11
10
11
11
11
October
10.4
10
12
11
11
10
November
10.4
11
12
10
10
December
9.5
10
9
9
11
Average
8.9
8.2
8.8
9.4
8.8
9.3
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
054°
063°
066°
084°
061°
February
067°
063°
089°
065°
056°
March
052°
062°
074°
082°
047°
April
119°
055°
048°
042°
053°
May
103°
054°
090°
056°
129°
June
123°
104°
060°
060°
086°
July
063°
055°
117°
106°
083°
August
109°
083°
066°
067°
081°
September
063°
137°
076°
099°
079°
October
083°
065°
081°
059°
105°
November
068°
046°
068°
048°
December
078°
056°
062°
055°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.