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
73.8
83
66
82
79
60
February
75.6
91
73
69
62
March
74.3
80
74
66
78
April
78.2
82
68
69
94
May
83.1
96
77
68
96
June
75.9
96
97
20
90
July
94.4
96
98
91
94
August
95.8
98
95
95
96
September
95.9
98
97
93
October
92.3
93
96
91
87
November
82.7
84
81
86
68
December
80.4
93
85
49
91
Average
84.6
83.8
91.5
85.2
72.6
84.1
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
19.1
20
21
18
18
20
February
19.0
20
19
19
19
March
22.1
22
22
22
23
April
23.8
24
24
23
24
May
23.1
10
27
26
26
June
29.1
29
31
29
28
July
30.3
32
31
30
30
August
30.9
32
30
31
31
September
29.5
31
29
29
October
26.3
27
25
27
25
November
22.3
22
23
22
24
December
21.1
21
23
24
20
Average
23.9
21.4
25.2
25.1
24.9
24.4
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
14.6
14
17
13
14
15
February
15.1
17
15
14
15
March
19.0
19
18
19
21
April
21.0
21
22
20
21
May
20.8
8
25
23
24
June
26.8
28
28
26
26
July
27.4
29
28
26
27
August
28.2
30
27
28
29
September
26.8
28
26
26
October
23.4
23
23
25
24
November
18.9
19
19
19
21
December
17.3
17
19
21
15
Average
20.6
17.7
22.3
22.0
21.8
21.4
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
0.0
0
0
0
0
0
February
0.0
0
0
0
0
March
0.0
0
0
0
0
April
0.0
0
0
0
0
May
0.0
0
0
0
0
June
0.0
0
0
0
0
July
0.0
0
0
0
0
August
0.0
0
0
0
0
September
0.0
0
0
0
October
0.0
0
0
0
0
November
0.0
0
0
0
0
December
0.0
0
0
0
0
Average
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
13.5
18
15
5
14
15
February
11.3
14
5
14
15
March
12.6
14
8
16
13
April
14.9
14
15
16
16
May
12.0
10
11
15
12
June
10.2
10
8
11
12
July
8.5
7
7
9
11
August
8.0
9
9
8
6
September
9.8
9
10
11
October
13.3
14
12
13
15
November
15.5
16
17
13
17
December
14.4
15
15
13
15
Average
12.7
14.9
11.2
9.8
12.6
13.3
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
067°
120°
135°
004°
063°
February
098°
098°
039°
077°
March
083°
121°
107°
116°
April
118°
099°
089°
088°
May
080°
155°
104°
103°
June
230°
265°
138°
112°
July
236°
201°
183°
172°
August
029°
169°
086°
310°
September
066°
048°
093°
October
063°
072°
062°
061°
November
054°
062°
057°
064°
December
047°
101°
143°
070°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.