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
89.8
100
84
94
86
95
February
88.8
97
92
90
74
88
March
90.8
90
93
89
94
89
April
88.1
92
88
94
99
95
May
92.1
90
94
99
92
June
94.6
100
100
91
98
July
76.5
84
96
93
96
August
63.2
93
94
90
75
September
57.9
96
95
92
27
October
78.5
93
94
94
57
November
83.1
90
92
99
41
December
86.9
92
86
87
89
Average
83.8
93.3
91.3
92.7
91.6
79.3
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
13.7
12
18
16
15
18
February
17.3
19
22
20
16
18
March
19.1
22
23
24
23
24
April
22.0
27
26
26
25
25
May
28.2
27
30
29
28
June
31.5
29
31
31
31
July
31.2
32
33
32
34
August
32.5
33
32
32
33
September
30.0
30
30
30
29
October
25.3
26
25
26
27
November
20.5
21
22
20
23
December
17.6
18
18
21
16
Average
23.5
20.7
24.5
24.9
25.1
25.5
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
4.2
2
6
4
5
8
February
7.2
6
10
8
6
8
March
8.5
10
11
10
10
13
April
10.3
12
13
12
11
13
May
16.5
16
18
15
17
June
21.2
19
23
21
21
July
21.3
24
23
22
23
August
22.3
22
22
23
23
September
19.1
18
19
18
20
October
13.7
12
11
15
17
November
8.5
8
11
5
12
December
6.9
7
8
10
4
Average
12.5
8.0
12.6
13.1
13.5
14.7
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
6.7
0
7
4
11
8
February
6.4
7
5
4
10
12
March
4.9
6
4
5
6
8
April
3.3
1
6
3
3
4
May
3.4
5
3
1
3
June
4.2
1
0
7
2
July
1.9
10
2
2
2
August
2.2
3
4
3
3
September
2.4
3
2
7
2
October
3.4
3
1
6
1
November
5.9
10
6
6
3
December
8.3
13
4
7
5
Average
4.4
5.5
5.8
3.3
5.4
4.1
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
4.9
2
4
4
6
6
February
4.6
3
5
3
6
6
March
5.3
5
4
5
6
5
April
4.8
4
4
3
6
7
May
4.4
5
3
5
5
June
3.9
5
2
4
5
July
3.1
2
2
3
4
August
2.6
3
1
3
3
September
3.4
3
2
3
5
October
3.9
4
3
3
5
November
4.4
4
5
4
5
December
4.4
4
4
4
5
Average
4.1
3.8
3.8
3.2
4.2
4.9
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
279°
276°
314°
284°
314°
February
266°
262°
234°
316°
285°
March
294°
263°
261°
066°
255°
April
162°
215°
241°
277°
276°
May
016°
267°
258°
286°
June
058°
228°
209°
288°
July
333°
243°
237°
223°
August
263°
265°
170°
211°
September
049°
014°
038°
060°
October
014°
033°
357°
063°
November
029°
040°
356°
050°
December
233°
350°
275°
304°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.