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
91.5
87
86
90
93
89
February
92.5
100
85
75
92
94
March
95.8
100
97
100
93
98
April
96.0
95
98
97
May
97.9
100
100
96
99
June
97.8
100
97
92
94
July
97.9
99
100
100
96
August
98.7
99
100
98
September
98.5
97
100
100
96
October
98.6
100
100
99
November
97.3
100
100
100
99
December
95.5
95
100
0
92
Average
96.1
93.2
98.1
97.5
93.9
95.7
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
26.4
25
22
22
27
28
February
26.4
26
24
25
27
27
March
26.1
26
24
20
25
27
April
25.4
22
26
27
May
25.0
28
20
24
26
June
23.0
27
16
22
23
July
22.5
24
18
13
22
August
26.3
26
22
27
September
29.0
29
19
27
30
October
30.4
25
27
32
November
29.2
26
25
25
32
December
27.4
26
21
22
27
Average
25.4
25.5
25.5
19.0
25.2
27.3
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
17.1
21
20
21
13
15
February
17.8
22
19
20
15
16
March
16.6
22
20
20
13
15
April
15.1
19
15
14
May
12.0
13
16
10
11
June
9.9
9
13
10
10
July
9.6
9
14
13
10
August
12.2
12
18
13
September
15.6
19
19
22
16
October
18.1
22
26
18
November
19.1
24
25
24
19
December
17.3
23
21
22
14
Average
15.6
21.3
16.1
15.8
13.6
14.0
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
10.1
12
14
10
13
10
February
6.9
0
9
0
6
7
March
3.3
0
0
0
3
3
April
1.1
3
0
0
May
0.0
0
0
0
0
June
0.3
1
3
0
0
July
0.3
0
6
0
0
August
0.0
0
0
0
September
0.0
0
0
0
0
October
1.1
0
0
1
November
1.9
0
33
25
2
December
4.7
9
0
0
8
Average
3.3
6.2
1.1
4.0
4.8
2.8
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
6.0
7
9
7
6
6
February
6.0
6
5
7
6
7
March
6.9
8
5
8
7
8
April
8.5
8
10
8
May
8.2
7
8
8
9
June
8.2
7
11
9
9
July
9.2
9
10
9
11
August
9.3
10
7
8
September
8.8
9
14
12
9
October
8.9
7
12
9
November
7.4
7
10
7
7
December
6.2
7
2
0
5
Average
7.8
7.0
7.9
9.3
7.2
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
075°
302°
050°
347°
066°
February
087°
334°
360°
330°
073°
March
082°
104°
105°
089°
087°
April
094°
095°
089°
May
089°
108°
096°
097°
June
096°
102°
096°
095°
July
098°
097°
090°
094°
August
093°
093°
091°
September
096°
092°
085°
091°
October
071°
076°
087°
November
085°
116°
119°
078°
December
042°
270°
360°
041°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.