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
82.5
75
69
85
87
84
February
79.1
89
80
85
72
81
March
86.1
82
81
96
93
78
April
86.7
82
88
80
83
May
90.4
89
91
86
98
June
93.8
93
100
93
94
July
95.9
98
99
88
98
August
96.2
97
94
95
97
September
94.5
100
95
97
95
October
90.9
89
97
94
90
November
84.2
76
77
94
84
December
82.9
83
68
83
90
Average
88.1
81.5
86.0
90.3
88.9
89.5
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
17
18
20
February
19.7
22
21
18
15
19
March
24.3
25
25
25
24
25
April
27.0
26
29
27
27
May
30.5
29
33
28
32
June
34.0
35
37
32
33
July
35.9
38
38
32
37
August
36.1
39
36
34
37
September
32.9
37
34
34
31
October
27.9
29
29
29
29
November
21.8
21
21
22
25
December
19.7
21
20
23
20
Average
26.6
20.8
28.4
28.3
26.6
27.7
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
6.0
4
8
4
5
9
February
8.1
11
8
3
5
7
March
12.4
14
13
8
11
15
April
14.9
15
16
15
14
May
19.4
19
21
20
19
June
22.3
23
23
23
22
July
23.5
25
24
23
25
August
23.4
25
24
24
24
September
21.1
23
20
20
20
October
15.8
17
15
17
15
November
10.1
11
11
10
12
December
7.9
9
12
12
5
Average
14.7
9.4
16.3
15.3
15.6
15.5
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
6.7
9
16
4
4
5
February
6.3
1
8
12
14
7
March
4.1
5
7
2
1
6
April
4.2
6
3
4
7
May
4.3
9
4
4
1
June
3.0
2
2
3
2
July
1.5
0
2
4
1
August
2.7
1
4
3
1
September
4.0
0
4
1
5
October
4.8
9
5
1
2
November
7.3
7
17
3
5
December
6.4
7
9
3
6
Average
4.5
5.1
6.0
5.4
3.5
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
7.7
8
7
8
8
8
February
8.5
9
9
8
8
9
March
8.8
8
9
10
10
8
April
9.1
9
10
9
8
May
8.4
6
10
8
8
June
7.8
7
8
7
9
July
7.3
7
8
7
8
August
7.2
8
7
7
7
September
6.5
6
5
6
9
October
7.6
8
7
7
7
November
7.2
7
8
7
7
December
7.0
6
7
7
7
Average
7.8
8.2
7.4
8.1
7.5
7.9
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
354°
341°
344°
328°
132°
February
256°
271°
354°
018°
318°
March
139°
140°
190°
129°
117°
April
099°
145°
102°
083°
May
123°
157°
116°
144°
June
170°
156°
143°
145°
July
174°
172°
144°
159°
August
157°
156°
156°
164°
September
146°
134°
102°
016°
October
111°
154°
158°
099°
November
018°
097°
108°
096°
December
100°
146°
189°
245°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.