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
January
100.0
100
100
100
February
100.0
100
100
100
March
100.0
100
100
100
April
97.0
100
94
May
99.4
100
98
June
98.5
99
97
July
100.0
100
100
August
98.4
99
97
September
97.6
99
94
October
98.1
99
95
November
100.0
100
100
December
99.5
100
98
Average
99.0
100.0
99.5
97.5
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
January
20.6
23
20
19
February
20.9
24
20
19
March
22.5
26
22
20
April
25.0
25
25
May
26.7
27
26
June
30.6
33
29
July
33.6
36
32
August
33.0
35
31
September
32.6
36
30
October
29.2
30
28
November
24.9
28
22
December
24.1
25
22
Average
25.9
24.3
28.1
25.2
Average highest temperature per day
The maximum temperature is typically observed some hours after noon.
Minimum temperatures (°C)
Month
Average
2024
2023
2022
January
11.4
11
11
12
February
11.1
11
12
11
March
11.5
12
12
11
April
13.6
13
14
May
15.5
15
16
June
19.1
18
20
July
24.1
25
23
August
24.8
25
25
September
24.1
24
24
October
20.3
21
20
November
15.9
18
14
December
13.5
13
14
Average
15.2
11.1
17.4
17.0
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
January
1.3
0
7
0
February
0.0
0
0
0
March
0.0
0
0
0
April
0.0
0
0
May
0.0
0
0
June
0.4
0
1
July
0.0
0
0
August
3.3
3
5
September
5.9
2
18
October
2.9
4
0
November
0.5
1
0
December
0.0
0
0
Average
1.2
1.3
2.3
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
January
8.0
8
7
10
February
7.1
7
9
7
March
7.5
8
7
6
April
8.0
9
7
May
9.1
9
9
June
8.3
8
8
July
7.5
7
8
August
7.5
8
6
September
7.3
7
8
October
7.8
8
7
November
7.0
7
7
December
7.8
8
8
Average
7.7
7.8
7.7
7.6
Average wind speed
Excluding wind gusts. Only observations between sunrise and sunset are taken into account.
Prevailing wind direction
Month
2024
2023
2022
January
348°
335°
012°
February
330°
339°
360°
March
331°
342°
283°
April
267°
223°
May
201°
185°
June
218°
201°
July
247°
198°
August
296°
178°
September
315°
148°
October
336°
319°
November
352°
343°
December
356°
357°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.