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
99.3
99
99
100
97
100
February
98.7
95
100
100
97
100
March
98.8
97
99
100
100
97
April
99.1
100
100
100
98
100
May
98.9
100
98
100
98
99
June
99.6
100
99
100
100
100
July
99.9
100
100
100
100
100
August
99.7
100
100
99
100
100
September
99.6
100
100
100
98
October
99.4
99
100
100
99
November
98.8
98
99
99
100
December
97.7
100
98
96
97
Average
99.2
99.1
99.2
99.6
98.7
99.1
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
14.2
15
15
14
13
15
February
15.2
16
15
16
15
16
March
16.6
18
17
16
16
16
April
18.9
20
19
18
18
19
May
22.1
23
23
24
21
23
June
27.4
27
28
30
28
25
July
30.0
30
31
31
30
30
August
30.1
32
29
31
29
30
September
27.0
27
28
29
26
October
23.6
25
25
23
21
November
18.5
19
20
18
19
December
15.3
16
17
15
14
Average
21.7
22.6
21.9
22.6
21.2
21.2
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
5.3
7
6
4
6
6
February
5.5
7
5
4
6
6
March
6.5
9
8
5
5
7
April
8.4
9
9
7
8
9
May
12.5
13
13
14
11
14
June
17.0
17
18
19
18
15
July
19.3
20
21
20
19
19
August
19.3
21
18
19
19
19
September
16.7
17
17
18
17
October
13.0
15
14
12
11
November
9.4
9
11
10
9
December
6.6
7
7
6
7
Average
11.7
12.7
12.0
11.9
11.3
11.5
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
9.6
8
12
5
27
5
February
9.7
18
9
4
7
8
March
10.8
11
6
17
9
14
April
8.5
5
6
13
12
13
May
6.6
5
5
5
9
4
June
1.5
1
3
2
1
2
July
0.4
0
0
0
3
0
August
0.4
0
3
1
0
0
September
3.4
2
7
1
7
October
4.5
4
2
7
10
November
13.3
14
9
18
4
December
14.4
5
17
20
19
Average
6.1
5.2
5.2
6.1
8.5
6.6
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
5.5
5
6
6
6
5
February
5.9
6
6
7
6
7
March
6.7
7
7
6
7
7
April
6.7
7
8
7
7
7
May
6.6
8
7
7
7
7
June
7.0
8
7
7
7
7
July
7.6
8
8
8
8
8
August
7.3
8
8
7
8
8
September
7.0
7
8
7
7
October
6.1
6
6
6
6
November
5.6
8
6
5
5
December
5.2
5
5
5
5
Average
6.6
7.0
6.9
6.7
6.6
6.6
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
333°
254°
276°
271°
300°
February
236°
235°
252°
242°
267°
March
227°
243°
224°
245°
237°
April
232°
242°
227°
228°
214°
May
223°
229°
211°
229°
219°
June
221°
223°
218°
220°
226°
July
210°
219°
211°
221°
219°
August
214°
224°
223°
225°
216°
September
213°
243°
234°
236°
October
218°
228°
241°
242°
November
280°
289°
294°
218°
December
324°
005°
310°
356°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.