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
91.2
94
84
95
57
89
February
86.9
93
95
90
55
84
March
86.2
86
95
88
23
69
April
81.7
97
92
95
0
100
May
79.2
92
94
0
100
June
89.7
95
95
12
100
July
95.1
96
91
89
100
August
88.3
89
88
51
90
September
86.1
94
60
85
87
October
92.3
96
92
94
92
November
74.3
87
6
97
84
December
79.5
92
50
79
92
Average
85.6
92.5
92.4
82.5
52.0
87.7
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
17.3
17
19
16
12
19
February
20.8
19
22
20
17
20
March
22.5
22
23
24
23
23
April
25.3
26
25
26
25
20
May
29.1
27
30
28
24
June
31.9
31
34
30
27
July
32.0
33
32
29
20
August
31.0
33
31
31
22
September
30.2
29
30
30
29
October
26.5
25
26
26
27
November
20.9
20
21
20
23
December
18.1
17
19
22
16
Average
24.5
20.9
25.4
25.4
24.2
22.3
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
6.8
5
8
5
11
8
February
9.1
7
11
8
7
3
March
11.2
12
12
11
12
15
April
14.2
14
14
13
13
20
May
18.4
17
19
16
24
June
22.1
20
22
23
27
July
23.2
24
23
22
20
August
22.3
23
23
21
15
September
20.9
20
20
20
21
October
16.0
14
12
16
18
November
10.1
9
11
7
13
December
8.7
8
10
11
5
Average
14.2
9.4
14.9
14.3
14.1
13.2
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
5.4
4
8
4
39
5
February
6.0
7
5
6
12
9
March
4.9
7
4
5
6
21
April
1.9
2
5
2
0
0
May
1.3
2
1
0
0
June
4.0
3
2
4
0
July
4.3
6
6
7
0
August
3.4
5
4
2
6
September
3.8
7
1
5
5
October
3.8
6
1
3
2
November
3.9
7
0
4
6
December
6.9
11
4
4
5
Average
4.2
5.0
5.4
2.6
3.6
5.9
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
2021
2020
January
4.1
4
4
4
3
4
February
4.2
4
4
4
5
4
March
4.5
3
5
5
5
6
April
3.8
3
4
4
4
4
May
3.8
4
4
4
3
June
3.2
3
3
2
2
July
2.5
2
2
2
2
August
2.7
3
2
2
2
September
3.3
3
4
2
4
October
3.2
3
3
2
4
November
3.6
4
5
3
4
December
3.6
4
3
3
3
Average
3.6
3.4
3.4
3.6
3.2
3.7
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
282°
255°
298°
195°
359°
February
232°
237°
224°
252°
245°
March
231°
235°
231°
136°
257°
April
220°
119°
211°
258°
270°
May
035°
207°
142°
243°
June
258°
046°
252°
270°
July
271°
224°
137°
308°
August
325°
350°
115°
195°
September
045°
034°
062°
057°
October
041°
017°
335°
067°
November
035°
033°
008°
056°
December
011°
034°
236°
282°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.