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
0
February
0.0
0
0
0
0
0
March
0.0
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
14.2
15
19
16
16
18
February
16.4
18
19
18
15
18
March
19.2
22
22
21
22
24
April
18.8
24
25
23
25
May
22.7
28
29
27
27
June
25.4
30
31
29
30
July
26.4
32
31
32
31
August
26.9
33
30
32
32
September
25.5
32
30
28
29
October
22.5
26
25
28
27
November
17.2
20
21
21
23
December
15.9
18
20
22
17
Average
20.6
18.4
25.1
24.7
23.9
24.9
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
7.4
7
13
7
9
11
February
9.9
11
13
9
7
11
March
13.0
15
15
13
14
18
April
13.3
18
18
17
17
May
17.6
22
23
21
21
June
20.6
26
25
24
24
July
21.8
27
26
26
26
August
21.7
27
25
25
25
September
19.4
24
22
21
23
October
15.8
18
17
20
19
November
10.0
13
14
12
15
December
9.4
10
13
15
9
Average
14.5
10.8
18.6
17.5
16.8
18.0
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
0
February
0.0
0
0
0
0
0
March
0.0
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
5.5
6
5
6
6
6
February
5.3
5
5
6
5
6
March
5.1
5
5
6
5
5
April
5.3
5
6
5
5
May
4.5
4
4
5
5
June
3.6
4
4
4
4
July
3.2
4
3
3
5
August
3.0
4
3
3
4
September
2.6
3
3
4
4
October
4.3
5
4
5
5
November
4.2
4
5
4
4
December
4.5
4
4
4
6
Average
4.3
5.3
4.4
4.3
4.5
4.7
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
350°
143°
342°
288°
099°
February
150°
128°
097°
040°
104°
March
112°
132°
147°
117°
125°
April
140°
130°
110°
119°
May
156°
194°
118°
139°
June
238°
251°
134°
120°
July
249°
244°
232°
186°
August
246°
201°
246°
251°
September
263°
337°
110°
036°
October
069°
267°
281°
109°
November
033°
057°
049°
058°
December
342°
115°
111°
092°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.