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
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
0
October
0.0
0
0
0
0
November
0.0
0
0
0
0
December
0.0
0
0
0
0
Average
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
16.8
16
19
18
16
February
20.5
22
20
18
17
March
24.9
24
25
25
25
April
29.5
28
31
27
32
May
32.6
31
36
30
34
June
35.6
38
37
34
35
July
36.4
38
38
34
37
August
35.8
38
34
35
38
September
31.9
34
30
34
31
October
26.9
27
25
30
29
November
21.3
19
18
23
24
December
18.7
19
18
24
18
Average
27.0
20.5
27.8
27.8
27.4
30.6
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
2.9
1
4
2
4
February
5.2
6
5
1
2
March
9.9
10
11
7
9
April
14.2
14
16
13
15
May
18.7
18
20
18
18
June
21.6
22
23
21
20
July
23.2
23
25
22
25
August
22.7
21
23
22
24
September
19.8
21
19
20
18
October
14.0
15
13
15
13
November
8.4
8
8
9
10
December
5.5
6
8
9
3
Average
13.1
5.8
13.9
14.0
13.8
16.1
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
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
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
8.2
9
8
9
8
February
8.0
8
9
8
5
March
8.5
8
6
9
8
April
8.2
8
6
6
9
May
8.6
9
5
10
8
June
8.8
7
10
8
10
July
8.9
9
9
8
10
August
7.7
8
8
8
8
September
7.4
6
7
7
7
October
7.7
8
7
7
9
November
7.4
6
9
7
8
December
8.0
8
8
7
9
Average
8.2
8.2
7.7
7.9
7.6
8.5
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
245°
270°
303°
286°
February
310°
256°
039°
065°
March
360°
137°
046°
111°
April
060°
086°
064°
085°
May
110°
109°
104°
096°
June
108°
111°
101°
113°
July
107°
111°
096°
110°
August
101°
101°
103°
108°
September
103°
101°
097°
062°
October
086°
100°
085°
076°
November
069°
078°
067°
079°
December
209°
080°
240°
296°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.