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
50.0
33
60
57
February
76.0
85
100
60
March
69.2
67
58
88
April
38.4
0
50
May
70.9
78
68
June
82.3
71
90
July
90.4
82
100
August
90.9
86
100
September
70.5
89
50
October
71.4
75
60
November
45.7
60
40
December
27.2
0
43
Average
66.6
68.0
68.4
63.4
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
13.8
14
16
13
February
17.0
20
19
13
March
20.0
20
20
21
April
22.4
19
25
May
26.3
26
27
June
28.3
30
27
July
28.2
28
28
August
27.0
28
26
September
24.5
29
22
October
20.3
22
19
November
16.2
16
16
December
16.3
15
19
Average
20.2
17.7
21.9
21.0
Average highest temperature per day
The maximum temperature is typically observed some hours after noon.
Minimum temperatures (°C)
Month
Average
2024
2023
2022
January
12.3
11
16
11
February
15.8
19
17
11
March
18.7
19
19
18
April
21.5
19
23
May
24.4
24
25
June
26.7
28
26
July
27.4
28
27
August
26.6
27
26
September
23.6
27
22
October
19.0
20
18
November
14.5
15
14
December
14.9
14
16
Average
19.0
16.5
20.9
19.5
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
January
27.7
33
0
43
February
4.0
8
0
0
March
15.3
17
25
0
April
38.4
100
20
May
6.4
11
5
June
5.8
0
10
July
0.0
0
0
August
9.0
14
0
September
11.7
0
25
October
19.0
25
0
November
20.0
10
24
December
0.0
0
0
Average
13.8
16.0
13.6
11.9
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
4.8
2
5
7
February
4.6
6
7
3
March
6.0
5
5
9
April
5.2
2
6
May
4.3
3
5
June
5.5
4
7
July
4.6
5
4
August
5.0
5
5
September
4.8
6
3
October
6.5
8
2
November
3.6
2
4
December
2.1
1
3
Average
4.7
4.5
4.8
4.8
Average wind speed
Excluding wind gusts. Only observations between sunrise and sunset are taken into account.
Prevailing wind direction
Month
2024
2023
2022
January
021°
015°
029°
February
109°
011°
353°
March
037°
360°
078°
April
360°
109°
May
075°
118°
June
101°
089°
July
119°
127°
August
348°
090°
September
014°
090°
October
090°
113°
November
075°
041°
December
315°
080°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.