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
96.8
94
92
97
99
97
February
96.4
97
98
96
96
91
March
97.0
93
100
100
99
95
April
97.9
99
96
98
100
99
May
95.0
98
96
99
95
97
June
94.6
96
97
92
98
96
July
94.1
90
97
97
93
96
August
94.1
99
88
95
96
98
September
94.9
100
99
88
99
96
October
94.3
93
98
89
96
November
95.0
96
96
97
93
December
97.2
99
98
98
96
Average
95.6
95.9
95.9
96.2
96.4
95.7
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
30.8
30
29
29
31
29
February
30.2
30
30
28
29
29
March
30.0
29
29
30
30
27
April
28.1
28
27
28
27
26
May
26.8
29
26
26
26
26
June
26.0
28
25
24
25
26
July
25.4
24
25
26
24
26
August
25.5
26
26
25
25
25
September
27.0
28
28
24
26
27
October
27.2
27
27
24
27
November
27.5
29
26
25
26
December
28.8
29
28
27
28
Average
27.8
27.7
27.3
26.7
26.6
26.9
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
23.8
24
24
24
25
23
February
23.5
25
24
24
24
23
March
23.3
24
24
24
25
23
April
22.4
23
23
23
22
22
May
21.1
22
21
21
21
20
June
20.1
21
20
19
20
21
July
19.3
20
19
20
18
20
August
19.1
19
20
19
20
20
September
20.8
22
22
19
21
23
October
21.7
22
22
20
23
November
21.4
23
21
21
22
December
22.9
24
22
23
24
Average
21.6
22.2
22.0
21.4
21.5
21.8
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
6.3
10
13
10
1
8
February
5.2
3
2
6
5
12
March
4.2
7
1
2
2
8
April
3.9
1
9
4
3
3
May
4.9
6
8
4
5
6
June
4.1
4
1
8
4
3
July
4.2
8
6
2
2
6
August
7.6
4
13
9
5
5
September
6.2
3
4
17
1
5
October
8.0
12
4
14
7
November
8.0
6
8
11
3
December
6.7
5
7
10
12
Average
5.8
5.1
6.5
6.6
5.2
6.7
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
7.8
8
7
8
8
8
February
7.5
8
8
8
8
7
March
7.6
8
8
8
8
8
April
7.1
7
8
8
8
7
May
6.6
7
7
7
7
7
June
6.1
7
6
6
6
6
July
6.7
7
7
7
7
7
August
6.9
7
7
7
7
7
September
7.7
8
8
8
8
8
October
7.9
8
8
8
9
November
8.0
9
9
8
8
December
8.3
9
8
9
8
Average
7.4
7.4
7.6
7.6
7.8
7.4
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
163°
156°
161°
157°
162°
February
156°
154°
158°
149°
161°
March
164°
153°
154°
156°
158°
April
154°
161°
163°
177°
163°
May
168°
167°
216°
153°
169°
June
083°
138°
182°
184°
088°
July
178°
166°
160°
187°
153°
August
199°
156°
170°
152°
164°
September
166°
165°
166°
163°
156°
October
163°
161°
152°
161°
November
164°
152°
162°
161°
December
162°
146°
160°
158°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.