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
99.4
100
100
99
99
100
February
99.4
100
100
100
100
100
March
98.9
97
100
100
100
100
April
99.7
100
100
99
100
May
99.7
100
98
100
100
June
100.0
100
100
100
100
July
98.9
100
100
100
100
August
98.9
100
97
100
100
September
99.1
100
100
100
96
October
100.0
100
100
100
100
November
99.6
97
100
100
100
December
100.0
100
100
100
100
Average
99.3
98.9
99.8
99.4
99.7
99.6
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
31.5
34
30
32
31
32
February
31.7
35
30
31
31
32
March
32.4
35
32
30
32
34
April
31.5
32
28
31
33
May
30.3
32
29
30
31
June
29.4
29
29
30
30
July
29.5
30
30
29
29
August
31.2
33
31
31
31
September
32.8
35
32
34
31
October
33.1
35
32
33
33
November
32.3
35
31
32
32
December
31.1
34
28
31
32
Average
31.6
34.2
32.1
30.3
31.3
31.7
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
26.9
28
28
28
27
27
February
26.6
29
26
27
27
28
March
27.2
29
28
25
27
28
April
26.7
28
25
25
28
May
26.3
27
26
26
27
June
26.1
26
26
25
27
July
25.0
26
27
26
27
August
27.1
28
27
27
28
September
27.7
30
28
28
27
October
29.0
30
29
28
30
November
28.3
31
26
29
29
December
26.9
27
24
28
29
Average
27.0
28.6
27.7
26.5
26.8
27.8
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
0.0
0
0
0
0
0
February
0.0
0
0
0
0
0
March
0.0
0
0
0
0
0
April
0.2
0
2
0
0
May
1.5
0
4
5
1
June
0.6
0
2
0
2
July
0.7
0
0
0
0
August
0.7
4
0
0
0
September
0.5
0
0
1
0
October
0.0
0
0
0
0
November
0.6
0
0
0
0
December
0.3
0
0
0
0
Average
0.4
0.3
0.5
0.4
0.3
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
11.6
11
12
12
12
12
February
11.6
11
12
12
12
12
March
11.4
11
12
11
12
12
April
11.1
12
12
11
11
May
10.5
11
11
11
10
June
10.6
11
11
11
12
July
10.2
11
11
10
10
August
10.1
10
10
10
10
September
10.8
12
11
11
10
October
10.7
11
11
10
11
November
11.3
11
11
12
11
December
11.3
11
12
12
11
Average
10.8
11.0
11.2
11.1
11.0
10.9
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
072°
075°
081°
084°
087°
February
077°
078°
082°
081°
081°
March
083°
079°
077°
084°
087°
April
077°
075°
081°
084°
May
076°
072°
074°
081°
June
078°
085°
087°
082°
July
083°
064°
081°
107°
August
081°
049°
084°
098°
September
083°
065°
084°
082°
October
082°
081°
087°
085°
November
087°
079°
080°
087°
December
083°
077°
078°
086°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.