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
90.6
92
95
87
91
89
February
86.0
94
89
84
79
83
March
88.1
92
91
86
88
95
April
90.3
92
94
93
95
May
92.4
93
95
95
90
June
90.4
91
93
90
90
July
86.8
96
97
89
96
August
93.0
96
94
94
95
September
92.1
97
89
89
87
October
91.9
89
92
95
87
November
86.5
83
88
89
85
December
86.6
93
91
84
92
Average
89.9
92.3
92.2
91.1
89.8
90.5
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
2021
2020
January
19.4
19
22
18
19
21
February
23.1
21
25
22
22
22
March
23.8
25
25
25
25
28
April
26.0
28
27
26
27
May
30.0
29
31
30
30
June
31.6
32
33
31
31
July
30.2
33
33
31
33
August
32.3
33
32
32
33
September
30.7
31
29
30
30
October
27.8
27
26
28
29
November
23.0
22
24
21
25
December
20.8
20
22
23
19
Average
26.0
21.4
27.1
26.9
26.6
27.2
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
8
6
8
9
February
10.6
8
12
9
9
10
March
11.0
13
13
12
12
14
April
13.9
16
15
13
15
May
17.5
17
19
16
17
June
21.5
21
21
22
21
July
20.7
23
23
22
23
August
22.7
24
23
23
22
September
21.0
20
21
21
22
October
17.2
15
14
17
19
November
12.0
12
15
9
16
December
9.6
10
11
12
6
Average
14.8
9.4
15.8
15.7
15.3
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
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
7.4
8
7
8
7
7
February
7.2
7
8
7
7
8
March
7.4
7
8
8
8
7
April
7.5
8
8
7
8
May
6.9
7
6
8
8
June
6.0
8
6
6
6
July
4.7
6
5
6
6
August
5.1
6
5
6
5
September
5.8
5
6
5
6
October
6.5
7
5
6
7
November
6.6
6
8
6
8
December
6.5
8
5
6
6
Average
6.5
7.4
7.0
6.4
6.5
6.7
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
294°
247°
300°
245°
048°
February
239°
242°
104°
257°
259°
March
196°
232°
218°
059°
213°
April
102°
117°
207°
240°
May
039°
192°
087°
083°
June
245°
093°
184°
087°
July
251°
199°
199°
200°
August
188°
130°
161°
193°
September
053°
030°
085°
067°
October
026°
026°
042°
052°
November
022°
033°
011°
049°
December
348°
047°
236°
293°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.