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
January
74.6
58
81
81
February
79.1
87
81
56
March
75.0
70
68
94
April
83.3
84
82
May
65.2
64
67
June
85.7
77
93
July
95.6
91
100
August
95.6
89
100
September
78.3
77
79
October
75.0
78
69
November
55.0
57
53
December
25.7
25
27
Average
72.7
72.2
69.9
76.2
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
January
16.9
17
19
15
February
16.8
21
19
12
March
22.0
22
23
21
April
24.1
24
25
May
26.3
25
28
June
29.2
31
29
July
29.4
28
32
August
27.9
28
28
September
27.8
29
27
October
22.0
21
23
November
17.1
17
17
December
16.8
17
16
Average
21.8
20.2
23.0
22.3
Average highest temperature per day
The maximum temperature is typically observed some hours after noon.
Minimum temperatures (°C)
Month
Average
2024
2023
2022
January
13.6
13
16
12
February
14.7
19
16
11
March
18.7
20
19
17
April
20.7
20
22
May
22.8
22
24
June
26.0
27
26
July
26.5
24
31
August
25.5
25
26
September
24.8
26
24
October
20.4
20
21
November
15.3
15
16
December
15.8
17
15
Average
19.1
17.5
20.1
19.8
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
January
18.3
21
19
16
February
6.2
9
0
11
March
12.5
7
28
0
April
11.9
8
18
May
17.3
18
17
June
10.7
15
7
July
8.6
9
8
August
8.6
0
14
September
24.3
31
21
October
19.4
22
15
November
25.0
24
26
December
22.8
17
36
Average
14.7
11.1
17.0
16.0
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
January
5.8
5
7
6
February
6.2
7
6
4
March
6.0
6
7
5
April
6.9
7
7
May
5.7
5
6
June
9.6
7
12
July
9.0
9
9
August
7.4
6
9
September
6.9
9
6
October
6.1
7
5
November
4.2
4
4
December
3.7
4
3
Average
6.1
5.8
6.2
6.3
Average wind speed
Excluding wind gusts. Only observations between sunrise and sunset are taken into account.
Prevailing wind direction
Month
2024
2023
2022
January
066°
013°
334°
February
355°
324°
143°
March
056°
076°
109°
April
170°
085°
May
015°
110°
June
103°
106°
July
102°
111°
August
128°
097°
September
085°
108°
October
341°
107°
November
339°
079°
December
088°
081°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.