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
77.7
88
0
75
74
February
80.1
80
100
50
80
March
99.6
99
100
100
April
99.3
0
100
99
May
96.0
96
June
97.7
100
98
July
97.6
89
99
August
97.5
97
100
99
September
97.9
97
100
99
October
95.5
87
0
99
November
98.9
93
100
98
December
99.0
94
67
100
Average
91.5
87.2
94.0
90.9
85.7
93.6
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
31.8
32
29
28
32
February
32.0
33
28
28
32
March
31.7
32
33
32
April
31.2
27
29
32
May
30.9
31
June
29.3
27
30
July
27.8
28
28
August
27.4
28
27
27
September
28.2
28
28
28
October
29.0
29
25
29
November
30.5
31
28
30
December
30.7
31
29
29
Average
29.4
32.1
28.7
28.3
27.8
30.0
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
26.0
27
29
28
25
February
27.5
28
27
28
27
March
27.3
27
29
27
April
27.4
27
29
27
May
26.8
27
June
26.8
27
27
July
25.0
26
25
August
24.3
25
24
24
September
25.0
26
26
25
October
25.5
27
25
26
November
27.1
30
27
27
December
27.1
29
27
28
Average
26.6
27.4
26.8
27.3
26.8
26.3
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
February
0.8
0
0
0
2
March
0.0
0
0
0
April
0.0
0
0
0
May
3.2
3
June
5.2
0
5
July
1.6
6
1
August
3.7
7
0
0
September
4.4
3
50
3
October
4.4
4
0
3
November
0.5
3
0
1
December
0.0
0
0
0
Average
3.9
4.6
14.2
1.3
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
4.4
4
0
3
5
February
5.5
5
3
3
6
March
7.6
6
6
8
April
6.8
0
3
7
May
6.0
6
June
5.8
2
6
July
6.9
6
7
August
8.4
7
9
9
September
7.9
6
11
7
October
7.1
4
0
8
November
5.1
5
4
5
December
5.2
4
4
9
Average
5.8
5.0
5.8
3.6
6.5
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
219°
360°
229°
218°
February
224°
232°
233°
228°
March
225°
228°
230°
April
360°
233°
212°
May
231°
June
315°
223°
July
227°
227°
August
227°
229°
229°
September
228°
229°
228°
October
234°
360°
229°
November
228°
231°
218°
December
201°
300°
224°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.