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
99.0
97
100
99
100
100
February
97.4
98
99
91
99
97
March
97.3
93
99
98
97
99
April
98.5
97
100
99
95
100
May
98.1
99
100
90
99
100
June
99.1
100
100
100
100
99
July
98.6
99
99
98
98
98
August
99.5
98
100
99
100
100
September
99.4
100
97
100
100
October
98.5
100
98
99
98
November
98.3
95
98
97
100
December
98.4
97
98
98
98
Average
98.4
97.5
98.9
96.7
98.4
98.8
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
28.8
29
28
28
28
29
February
28.6
29
29
28
28
28
March
27.6
27
29
27
27
27
April
25.6
26
26
26
25
27
May
23.0
23
23
23
23
23
June
21.1
22
22
20
21
21
July
20.7
21
21
19
21
21
August
22.1
23
23
21
22
22
September
23.6
24
23
23
24
October
24.9
26
25
26
26
November
26.4
26
26
26
27
December
28.1
29
26
28
28
Average
25.0
24.8
25.3
24.2
24.7
25.1
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
22.2
23
21
22
22
23
February
21.6
22
22
20
21
23
March
20.7
21
22
20
20
20
April
17.0
18
16
18
16
18
May
13.8
15
11
17
13
14
June
11.2
10
11
10
11
12
July
10.4
10
11
10
11
11
August
11.4
14
13
11
12
11
September
13.9
15
14
14
15
October
17.2
17
17
17
17
November
18.8
19
17
20
19
December
21.0
22
19
20
22
Average
16.5
16.5
16.5
16.1
16.3
16.9
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
10.3
23
2
21
8
12
February
15.0
14
7
30
7
27
March
16.6
25
10
12
19
16
April
11.5
11
7
13
16
8
May
11.7
13
6
35
6
7
June
5.6
1
3
2
6
8
July
9.2
12
5
24
7
11
August
4.5
13
4
8
1
3
September
4.3
4
9
3
4
October
10.3
2
15
4
7
November
7.6
14
4
12
1
December
8.4
7
10
8
12
Average
9.9
14.2
6.0
15.6
8.1
9.8
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
10.7
10
10
10
10
12
February
10.2
9
10
10
10
9
March
9.5
9
9
9
10
9
April
8.9
8
11
8
8
9
May
8.2
7
9
9
8
9
June
8.4
8
8
9
9
9
July
8.9
10
8
9
10
9
August
9.7
9
9
8
9
11
September
11.4
11
10
12
11
October
11.5
13
11
12
12
November
12.1
11
12
11
12
December
11.6
12
12
10
12
Average
10.0
8.8
10.1
9.7
9.8
10.4
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
084°
081°
109°
087°
045°
February
087°
096°
117°
093°
086°
March
123°
062°
099°
068°
111°
April
105°
188°
117°
126°
077°
May
154°
197°
133°
181°
177°
June
244°
197°
237°
240°
173°
July
227°
157°
207°
272°
228°
August
053°
079°
067°
020°
294°
September
069°
037°
044°
073°
October
054°
058°
037°
056°
November
052°
047°
054°
065°
December
035°
093°
086°
047°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.