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
72.0
72
88
63
64
65
February
93.2
88
92
96
97
98
March
96.3
98
93
96
99
96
April
98.7
97
100
98
100
98
May
99.4
99
99
99
99
June
99.8
99
100
100
100
July
99.8
99
100
100
100
August
96.0
99
100
94
84
September
95.7
99
96
100
77
October
95.8
96
100
92
88
November
85.0
94
91
66
92
December
73.7
82
63
66
62
Average
92.4
89.2
95.4
92.9
90.6
88.8
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
14.5
15
14
16
15
14
February
17.0
17
15
20
18
20
March
19.3
20
16
23
19
19
April
24.3
24
24
25
26
24
May
28.7
27
30
31
30
June
33.7
31
35
35
34
July
36.8
37
37
38
36
August
36.0
35
37
36
37
September
32.9
31
35
34
34
October
27.2
28
29
25
29
November
19.4
21
17
19
19
December
14.1
17
12
12
14
Average
24.6
18.7
24.6
26.7
25.8
25.7
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
4.7
7
5
3
4
4
February
4.0
7
3
2
4
4
March
6.4
8
6
7
5
7
April
8.9
9
8
9
8
10
May
12.0
12
12
12
13
June
15.8
15
17
17
17
July
18.1
17
18
20
18
August
17.5
18
18
17
19
September
15.1
14
18
15
16
October
10.1
12
12
11
11
November
5.4
6
4
8
4
December
4.0
5
4
5
3
Average
9.8
7.6
10.0
10.4
10.3
10.4
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
4.9
5
9
0
5
2
February
4.1
7
6
0
1
0
March
4.1
2
9
3
2
6
April
1.9
4
0
3
0
2
May
0.6
1
0
0
1
June
0.0
0
0
0
0
July
0.0
0
0
0
0
August
0.0
0
0
0
0
September
0.1
0
1
0
0
October
0.7
1
0
3
0
November
1.9
3
4
0
1
December
2.6
3
5
8
0
Average
1.9
4.5
2.6
1.1
1.4
1.0
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
2021
2020
January
5.2
6
8
2
5
5
February
5.7
5
6
4
7
4
March
5.8
5
8
6
6
4
April
6.5
6
7
7
6
7
May
7.0
6
9
8
7
June
7.0
6
8
7
7
July
6.4
6
7
6
6
August
5.9
5
7
6
6
September
5.5
6
6
6
6
October
5.2
5
5
6
4
November
3.9
4
4
4
4
December
4.7
4
5
5
5
Average
5.8
5.6
5.8
6.0
5.9
5.5
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
124°
142°
094°
113°
328°
February
147°
154°
328°
331°
322°
March
302°
140°
327°
327°
275°
April
320°
325°
322°
317°
328°
May
303°
327°
321°
318°
June
314°
328°
322°
319°
July
320°
320°
320°
320°
August
307°
319°
314°
316°
September
313°
325°
319°
321°
October
323°
324°
321°
326°
November
323°
321°
331°
329°
December
043°
164°
137°
004°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.