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
100
99
99
99
February
99.2
98
99
100
100
99
March
98.7
98
100
98
100
97
April
96.9
95
98
96
96
98
May
95.8
93
91
98
99
95
June
97.6
98
95
100
97
100
July
97.6
98
98
97
97
96
August
97.8
94
99
97
99
97
September
98.7
99
97
98
100
99
October
98.9
100
100
99
99
98
November
97.2
98
96
99
92
December
99.3
99
99
99
100
Average
98.1
97.1
97.8
97.9
98.5
97.5
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
30.4
31
30
31
31
30
February
30.8
31
31
31
31
31
March
30.6
32
30
31
30
31
April
29.9
30
30
31
29
30
May
29.1
30
29
31
28
29
June
27.9
28
28
28
27
28
July
27.3
28
28
28
27
27
August
27.2
28
29
27
27
27
September
27.7
28
28
28
28
28
October
28.7
29
29
29
29
29
November
29.3
30
29
29
29
December
30.1
30
31
30
31
Average
29.1
29.2
29.4
29.5
28.6
28.9
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
25.1
26
25
26
26
24
February
25.6
26
25
26
26
26
March
25.0
26
26
26
25
26
April
23.8
26
25
25
25
25
May
23.3
25
25
25
23
24
June
21.9
24
24
24
23
24
July
21.9
24
24
23
22
23
August
22.2
23
24
23
23
23
September
22.5
23
24
22
23
23
October
23.7
24
24
24
24
25
November
24.1
24
25
24
25
December
24.6
25
25
26
26
Average
23.6
24.4
24.5
24.3
24.1
24.2
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
1.8
3
2
2
4
3
February
2.6
5
4
5
3
2
March
3.8
3
5
7
2
6
April
7.5
16
4
8
8
7
May
8.7
13
15
8
4
11
June
6.4
7
10
4
7
4
July
6.4
6
5
7
11
7
August
5.7
13
3
7
6
6
September
4.0
4
6
5
2
5
October
2.5
0
3
3
3
4
November
4.3
4
8
4
7
December
1.4
3
3
2
1
Average
4.7
7.0
5.2
5.4
4.5
5.1
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
9.6
10
10
9
10
9
February
9.2
8
9
9
10
8
March
8.5
8
8
8
9
8
April
7.7
7
7
8
8
8
May
7.8
8
8
8
8
8
June
8.8
9
9
9
8
9
July
9.4
9
9
10
9
9
August
9.4
9
10
10
9
10
September
9.9
10
10
10
9
10
October
10.8
11
11
11
10
11
November
10.4
11
10
9
10
December
10.3
10
11
10
11
Average
9.3
8.9
9.3
9.3
9.1
9.2
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
073°
080°
090°
090°
077°
February
099°
091°
087°
082°
093°
March
097°
104°
118°
102°
134°
April
164°
114°
124°
118°
143°
May
137°
151°
137°
142°
147°
June
124°
142°
154°
144°
130°
July
124°
128°
124°
142°
126°
August
112°
101°
126°
135°
123°
September
105°
100°
107°
109°
106°
October
082°
087°
088°
089°
076°
November
082°
096°
076°
088°
December
088°
069°
065°
078°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.