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
99
100
100
99
99
February
99.3
99
100
99
99
100
March
98.5
98
98
99
100
100
April
92.9
96
92
99
98
79
May
91.3
67
88
97
100
87
June
97.2
94
99
98
98
94
July
98.5
98
100
98
99
99
August
98.7
99
99
99
98
98
September
98.1
99
100
98
98
96
October
96.7
99
97
98
99
98
November
97.8
96
100
99
94
December
98.6
99
100
99
100
Average
97.1
94.6
97.2
98.5
98.7
95.3
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
26.1
27
27
27
26
26
February
27.6
29
28
27
28
27
March
29.2
32
29
29
28
29
April
30.4
32
31
31
29
32
May
29.8
32
31
29
30
30
June
28.2
28
29
27
30
28
July
28.2
28
29
28
29
29
August
29.1
29
30
28
29
29
September
29.3
30
31
28
29
29
October
27.5
28
28
27
29
28
November
25.9
27
27
26
26
December
25.3
26
26
26
25
Average
28.1
29.4
28.6
27.8
28.2
28.1
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
14.9
16
14
16
17
13
February
14.9
15
16
16
15
15
March
15.9
18
17
16
15
18
April
18.0
19
18
18
16
24
May
18.2
20
19
18
18
22
June
18.1
20
18
17
18
23
July
18.1
19
19
17
18
22
August
17.7
18
19
17
15
21
September
16.5
19
20
17
14
17
October
16.8
18
19
18
16
16
November
16.0
17
17
15
19
December
14.8
17
15
15
15
Average
16.7
18.3
17.6
16.8
15.9
18.5
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
1.4
2
1
1
1
1
February
1.1
0
1
2
2
3
March
0.8
1
1
1
2
0
April
1.3
2
0
2
2
0
May
2.5
2
2
7
1
2
June
7.4
22
5
11
4
3
July
4.1
8
5
5
5
1
August
3.5
3
4
8
1
2
September
2.6
4
1
7
1
1
October
6.1
2
8
9
3
5
November
5.3
11
6
1
17
December
2.4
2
2
1
2
Average
3.3
4.7
3.4
5.3
1.9
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
8.4
8
7
8
9
8
February
7.7
8
9
9
7
8
March
7.6
7
6
8
8
8
April
6.4
7
6
6
6
6
May
5.4
5
5
6
6
7
June
5.2
5
5
6
5
7
July
7.2
7
7
7
7
7
August
6.0
6
6
6
6
6
September
5.0
5
6
5
5
4
October
5.9
7
6
7
5
6
November
7.6
7
7
9
7
December
8.4
9
8
8
8
Average
6.7
6.3
6.5
6.6
6.6
6.7
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
001°
047°
032°
026°
028°
February
350°
068°
024°
034°
037°
March
025°
067°
036°
037°
031°
April
018°
076°
040°
040°
086°
May
139°
057°
042°
073°
066°
June
152°
043°
042°
091°
061°
July
010°
019°
049°
053°
043°
August
014°
033°
056°
054°
036°
September
084°
022°
084°
067°
029°
October
350°
346°
026°
034°
022°
November
353°
031°
017°
012°
December
350°
041°
026°
023°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.