Percentage of observations where the VFR minimums for ceiling and visibility are met: visibility of 5 mi 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
85.6
83
84
95
87
80
February
85.1
97
86
81
74
84
March
88.5
87
90
90
86
88
April
90.1
91
93
88
89
May
96.9
97
99
95
98
June
98.5
99
99
98
98
July
98.7
100
99
99
98
August
98.9
100
99
99
99
September
96.6
97
100
98
92
October
94.6
97
97
98
91
November
88.1
82
87
93
89
December
86.9
92
83
86
82
Average
91.5
89.1
93.2
94.1
92.4
90.9
Marginal VFR conditions or better during daylight period
Percentage of observations where the MVFR minimums for ceiling and visibility are met: visibility of 3⅛ mi 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
18.1
16
20
18
18
19
February
19.0
21
21
17
16
19
March
23.5
23
24
22
23
25
April
25.5
25
27
24
26
May
29.5
31
31
28
29
June
33.2
36
34
32
32
July
34.0
37
34
32
33
August
34.5
39
32
33
34
September
32.2
36
32
30
30
October
27.2
29
27
28
27
November
21.6
22
20
22
24
December
20.6
20
21
24
19
Average
24.7
20.1
28.4
26.4
25.8
26.4
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
8.9
6
12
7
9
11
February
9.7
12
12
6
9
10
March
14.5
15
16
11
13
18
April
17.2
17
18
16
18
May
21.3
21
23
21
21
June
23.4
24
21
25
24
July
25.2
25
26
25
26
August
22.8
26
15
25
25
September
22.4
24
22
21
23
October
17.5
18
16
19
18
November
12.4
12
13
12
15
December
11.2
10
14
16
9
Average
15.3
11.2
18.0
16.0
17.6
17.9
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
5.6
9
5
4
4
6
February
3.7
2
3
4
6
4
March
2.3
4
2
3
2
2
April
2.4
3
0
4
2
May
4.1
3
1
10
2
June
3.1
2
2
6
3
July
2.7
1
3
5
3
August
3.2
0
7
3
3
September
3.4
1
1
7
5
October
3.8
5
2
3
4
November
7.5
10
15
3
3
December
3.2
1
1
1
9
Average
4.0
4.8
2.8
3.6
4.5
3.7
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
8.7
9
7
9
9
9
February
9.3
10
10
9
9
9
March
10.0
9
10
10
10
11
April
10.2
10
12
10
10
May
9.4
7
11
10
10
June
8.3
8
8
8
9
July
7.6
8
8
6
8
August
7.3
9
7
7
7
September
6.4
7
3
7
8
October
6.6
9
0
8
8
November
6.1
7
0
8
8
December
7.1
8
0
9
8
Average
8.3
9.2
8.3
6.9
8.5
8.6
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
360°
236°
357°
282°
085°
February
183°
148°
022°
079°
258°
March
105°
124°
127°
108°
140°
April
106°
133°
105°
103°
May
114°
147°
122°
133°
June
178°
144°
142°
138°
July
172°
163°
150°
162°
August
152°
147°
136°
140°
September
118°
089°
100°
054°
October
088°
305°
123°
070°
November
057°
360°
086°
082°
December
065°
360°
160°
108°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.