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
100
98
96
100
100
February
98.9
100
99
100
96
100
March
99.4
100
100
98
100
100
April
99.5
100
100
100
100
100
May
99.9
100
100
100
100
100
June
99.9
100
100
100
100
100
July
99.9
100
100
100
100
100
August
99.9
100
100
100
100
100
September
99.7
100
100
100
100
October
99.6
99
100
99
100
November
99.7
100
100
100
100
December
99.8
100
100
100
99
Average
99.6
99.8
99.6
99.5
99.5
99.9
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
13.1
14
15
12
15
12
February
14.5
17
13
14
15
15
March
16.5
18
17
12
16
16
April
20.3
24
19
21
20
19
May
24.9
25
23
25
27
25
June
30.1
34
28
30
29
29
July
32.6
34
35
32
34
31
August
32.1
33
33
32
34
32
September
28.3
28
28
28
29
October
23.5
25
23
21
25
November
19.3
22
20
19
18
December
15.4
17
17
15
16
Average
22.7
24.7
23.0
22.4
22.6
22.3
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
4.8
7
6
3
6
4
February
5.7
7
4
6
5
5
March
7.0
8
7
4
6
7
April
9.4
13
9
10
9
9
May
14.0
14
14
14
14
14
June
19.0
22
18
20
18
18
July
22.4
25
23
22
24
22
August
22.7
23
24
22
22
21
September
18.5
19
18
18
20
October
14.0
15
15
14
14
November
10.7
12
11
11
10
December
7.6
8
12
7
10
Average
13.1
14.8
13.1
13.1
12.8
12.7
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
5.9
7
4
8
3
8
February
6.6
5
7
6
11
5
March
4.5
2
1
8
2
11
April
3.4
2
4
4
4
5
May
1.9
2
2
2
0
1
June
1.0
0
3
0
1
0
July
0.3
1
0
1
0
0
August
0.3
0
0
1
0
1
September
1.6
1
1
0
1
October
1.5
0
1
4
3
November
3.9
2
3
4
2
December
6.4
1
2
7
7
Average
2.8
1.9
1.8
2.7
2.5
3.3
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
9.0
11
8
9
10
10
February
9.3
8
9
8
10
9
March
9.4
7
10
10
10
10
April
8.8
10
8
9
9
11
May
8.4
9
10
9
8
8
June
9.4
11
9
12
7
8
July
11.7
13
10
15
12
13
August
12.4
11
12
11
10
11
September
11.1
12
10
12
12
October
9.4
8
12
11
6
November
9.1
9
9
10
12
December
8.3
8
8
10
9
Average
9.8
10.0
9.3
10.3
9.9
9.9
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
333°
184°
002°
223°
360°
February
057°
358°
001°
023°
324°
March
138°
020°
013°
003°
035°
April
042°
144°
043°
049°
033°
May
048°
034°
043°
066°
066°
June
038°
046°
034°
065°
059°
July
043°
038°
026°
031°
022°
August
050°
042°
027°
033°
031°
September
035°
042°
025°
023°
October
047°
019°
020°
256°
November
221°
020°
020°
017°
December
286°
167°
246°
179°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.