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
94.5
92
95
96
100
95
February
94.7
100
92
95
90
93
March
95.4
99
96
86
96
97
April
97.1
100
89
100
100
May
98.8
100
97
100
100
June
96.1
99
94
98
92
July
98.1
99
98
90
100
August
98.2
98
99
99
89
September
97.9
98
100
97
100
October
96.2
99
100
88
100
November
98.5
100
97
100
100
December
93.7
94
97
87
Average
96.2
96.2
97.5
96.0
94.2
95.6
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
26.6
28
26
25
23
27
February
27.0
30
26
27
25
27
March
27.4
31
27
25
26
26
April
26.2
28
24
26
26
May
24.3
28
23
16
24
June
20.6
26
20
20
17
July
20.6
22
21
18
18
August
24.8
26
26
23
24
September
27.6
31
28
28
23
October
29.8
32
30
28
28
November
29.3
33
28
29
26
December
27.8
30
26
27
Average
26.5
29.4
27.7
24.8
25.0
24.8
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
20.1
18
19
19
22
22
February
20.3
21
19
19
21
20
March
19.0
19
16
19
22
20
April
18.9
15
18
23
25
May
15.1
13
13
16
23
June
12.8
11
10
16
16
July
12.6
10
12
15
16
August
14.9
12
12
16
23
September
17.0
17
16
18
18
October
20.8
19
22
20
28
November
21.3
20
19
21
25
December
20.8
20
19
21
Average
18.7
19.1
15.9
15.7
19.3
20.9
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
9.2
10
12
10
0
5
February
5.7
1
12
2
6
10
March
4.5
0
5
11
4
8
April
1.1
1
2
0
0
May
0.5
0
2
0
0
June
2.0
0
5
0
0
July
0.5
1
0
3
0
August
0.6
0
2
1
0
September
0.8
1
0
0
0
October
2.2
2
0
5
0
November
2.4
2
4
1
0
December
6.8
9
4
11
Average
3.5
4.1
3.1
2.8
3.5
5.6
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
8.1
8
9
6
8
9
February
8.0
9
7
8
8
8
March
8.9
9
8
10
8
9
April
7.1
6
8
9
8
May
6.7
6
8
5
7
June
8.1
5
11
7
9
July
8.2
8
8
10
9
August
8.7
8
9
10
9
September
8.6
8
9
9
12
October
8.5
8
10
10
9
November
7.9
7
8
7
10
December
7.8
7
8
8
Average
8.6
8.5
7.2
8.5
8.5
8.6
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
111°
108°
073°
060°
108°
February
108°
096°
108°
057°
085°
March
106°
114°
105°
092°
105°
April
102°
097°
102°
104°
May
084°
096°
090°
129°
June
093°
099°
100°
116°
July
110°
098°
104°
095°
August
103°
083°
100°
097°
September
089°
085°
127°
099°
October
093°
083°
124°
102°
November
088°
080°
043°
007°
December
101°
021°
064°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.