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
92.0
92
94
91
90
93
February
91.4
89
94
90
92
94
March
94.5
92
93
94
95
94
April
94.3
99
96
93
93
94
May
96.3
96
98
98
97
June
95.7
94
99
97
96
July
96.8
99
96
94
98
August
84.5
97
97
96
98
September
86.5
94
93
94
94
October
86.7
94
96
68
90
November
89.6
87
86
91
94
December
89.2
94
87
83
95
Average
91.8
93.2
94.3
93.9
91.2
94.8
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
20.6
22
24
18
22
23
February
25.5
23
27
23
25
25
March
26.7
27
28
26
27
29
April
28.4
28
30
28
28
29
May
31.1
31
32
32
31
June
32.4
33
33
32
32
July
31.8
27
33
32
33
August
32.8
34
33
33
32
September
31.9
33
31
31
32
October
29.1
29
25
30
30
November
25.5
25
26
24
27
December
23.4
22
24
26
21
Average
27.8
24.8
28.3
27.7
28.4
28.7
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
7.8
10
10
1
9
11
February
11.4
9
13
4
12
12
March
11.9
15
14
6
13
14
April
14.0
14
17
7
15
17
May
17.7
18
17
18
18
June
21.0
21
17
22
22
July
20.3
17
12
23
23
August
23.0
24
22
23
23
September
21.5
22
19
21
23
October
17.7
18
9
18
21
November
14.4
14
17
12
17
December
11.0
12
13
10
8
Average
15.4
11.8
16.6
11.9
16.2
17.3
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
2.2
3
0
6
1
3
February
2.7
8
1
3
4
2
March
1.3
3
2
3
1
1
April
2.6
2
2
3
2
8
May
3.1
2
1
1
1
June
4.3
2
3
4
4
July
4.8
7
4
6
4
August
3.8
6
1
5
4
September
3.4
1
7
6
3
October
2.0
3
0
1
3
November
4.0
7
5
8
4
December
3.1
6
0
2
4
Average
3.1
3.6
3.2
3.0
3.2
3.2
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
6.6
8
7
6
6
7
February
5.9
7
8
0
8
8
March
5.9
7
8
0
8
6
April
5.8
7
8
0
6
8
May
5.8
6
4
8
7
June
5.1
7
6
5
5
July
4.3
4
5
5
5
August
4.4
5
5
5
5
September
4.9
5
5
5
6
October
5.8
7
5
5
7
November
6.2
7
7
6
8
December
6.0
8
5
5
6
Average
5.7
7.3
6.5
3.8
6.0
6.4
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
299°
236°
311°
251°
053°
February
264°
204°
033°
235°
233°
March
173°
226°
007°
131°
165°
April
122°
109°
360°
238°
229°
May
025°
144°
085°
037°
June
262°
070°
160°
102°
July
242°
162°
184°
210°
August
096°
135°
144°
133°
September
034°
021°
062°
075°
October
023°
029°
044°
064°
November
030°
027°
016°
049°
December
017°
041°
237°
018°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.