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
70.6
57
70
76
February
80.5
83
70
84
March
77.0
64
78
86
April
83.4
73
86
May
86.7
88
86
June
85.7
70
90
July
91.8
86
97
August
98.1
100
97
September
77.2
92
69
October
72.5
86
62
November
66.6
67
67
December
59.2
61
56
Average
74.7
65.5
76.9
81.7
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
22.0
23
22
22
February
21.6
24
21
21
March
25.1
26
25
24
April
27.6
27
28
May
27.5
27
28
June
27.4
28
27
July
26.3
26
26
August
26.3
27
26
September
25.6
26
25
October
24.8
26
24
November
22.5
23
22
December
21.9
22
22
Average
24.6
24.4
24.8
24.7
Average highest temperature per day
The maximum temperature is typically observed some hours after noon.
Minimum temperatures (°C)
Month
Average
2024
2023
2022
January
19.5
21
20
18
February
19.7
22
19
18
March
21.8
24
22
20
April
22.9
24
22
May
24.6
26
24
June
24.6
27
23
July
24.6
25
25
August
24.0
25
23
September
23.6
25
23
October
22.8
24
22
November
21.3
22
21
December
20.0
20
21
Average
22.4
22.6
23.0
21.5
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
January
12.0
3
11
16
February
1.7
9
0
0
March
1.6
2
3
1
April
1.8
0
2
May
2.8
0
4
June
8.7
0
11
July
9.8
14
6
August
0.0
0
0
September
10.6
13
10
October
19.3
18
21
November
18.8
26
14
December
21.0
20
22
Average
6.9
3.3
9.5
7.8
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
6.1
7
6
6
February
6.5
7
4
8
March
8.5
9
8
9
April
6.6
6
7
May
5.8
6
6
June
6.0
7
6
July
6.5
6
7
August
7.9
7
8
September
7.1
8
7
October
6.3
6
7
November
5.6
7
5
December
5.6
6
5
Average
6.9
8.0
6.2
6.6
Average wind speed
Excluding wind gusts. Only observations between sunrise and sunset are taken into account.
Prevailing wind direction
Month
2024
2023
2022
January
328°
348°
353°
February
346°
351°
359°
March
333°
252°
356°
April
359°
019°
May
357°
355°
June
360°
005°
July
346°
011°
August
355°
002°
September
353°
356°
October
009°
003°
November
335°
355°
December
324°
352°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.