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
99.2
100
0
100
February
98.8
99
100
March
99.0
99
100
April
99.8
100
100
May
99.7
100
100
100
June
99.6
100
100
July
100.0
100
August
100.0
100
100
100
September
99.7
100
100
100
October
99.7
100
100
November
100.0
100
100
December
100.0
100
100
Average
95.7
99.3
99.8
100.0
100.0
100.0
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
18.3
19
8
12
February
18.5
19
13
March
18.0
19
17
April
18.9
20
18
May
19.2
20
9
18
June
19.9
20
10
July
20.7
21
August
20.8
21
19
16
September
19.7
20
12
19
October
19.5
20
13
November
19.6
20
15
December
19.1
19
14
Average
17.2
19.0
19.6
13.1
15.4
17.7
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
9.0
9
8
12
February
8.5
8
13
March
8.4
8
9
April
6.5
7
6
May
5.0
5
9
18
June
0.9
0
10
July
1.1
1
August
4.4
3
11
16
September
6.5
5
12
19
October
8.4
8
13
November
8.8
8
15
December
8.3
8
14
Average
13.1
8.1
5.2
13.1
10.4
17.7
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
10
0
100
February
9.0
9
0
March
5.5
6
4
April
2.9
5
0
May
2.6
3
0
0
June
0.0
0
0
July
0.2
0
August
0.0
0
0
0
September
2.2
2
0
0
October
6.4
7
0
November
5.4
5
50
December
6.7
7
0
Average
8.6
7.6
2.9
25.0
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
5.3
5
17
17
February
5.2
5
27
March
5.2
5
5
April
4.6
5
5
May
4.8
5
5
6
June
5.5
6
4
July
5.5
6
August
6.7
7
7
5
September
6.2
6
14
9
October
6.3
6
15
November
5.9
6
19
December
5.1
5
6
Average
5.9
5.1
5.6
14.7
6.5
7.0
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
056°
119°
037°
February
062°
310°
March
063°
110°
April
037°
021°
May
038°
345°
168°
June
048°
341°
July
031°
August
026°
001°
153°
September
041°
306°
270°
October
040°
251°
November
069°
284°
December
067°
158°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.