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
84.4
88
74
88
83
89
February
78.3
92
81
78
79
79
March
87.4
86
88
82
87
79
April
92.4
87
92
96
94
May
91.7
91
90
92
93
June
91.8
94
95
87
92
July
84.4
88
48
87
91
August
90.8
97
84
91
96
September
94.1
98
91
87
99
October
90.5
95
90
88
94
November
87.9
88
86
95
88
December
77.0
86
68
76
87
Average
87.9
88.4
89.1
82.8
87.6
90.4
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
13.2
12
16
13
12
14
February
17.3
18
19
17
14
14
March
20.2
20
21
21
21
22
April
22.9
21
23
23
22
May
25.1
13
28
26
26
June
30.0
30
32
29
30
July
31.5
32
33
30
32
August
31.2
33
31
31
31
September
29.4
30
29
28
28
October
24.0
24
24
24
23
November
17.6
19
19
18
18
December
14.8
15
16
19
14
Average
22.4
16.5
22.7
23.8
22.7
23.0
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
3.6
2
7
1
4
6
February
6.8
7
8
4
3
5
March
9.3
10
9
8
10
13
April
10.9
11
11
10
11
May
14.9
7
17
15
15
June
19.8
19
21
19
20
July
21.5
22
22
21
22
August
21.3
22
22
22
21
September
19.0
19
17
19
19
October
13.2
14
10
14
13
November
6.9
8
8
5
9
December
5.7
5
9
9
3
Average
12.0
6.0
12.4
12.7
12.6
13.0
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
9.1
9
12
8
8
10
February
10.4
7
12
12
9
17
March
7.4
10
9
5
9
13
April
4.2
6
4
2
6
May
4.0
6
5
1
5
June
4.5
4
1
10
4
July
2.6
3
2
4
3
August
5.9
3
9
9
6
September
3.4
2
2
6
4
October
5.3
2
4
6
7
November
5.6
5
8
2
6
December
9.0
3
11
6
6
Average
6.1
8.8
5.3
5.3
5.9
6.7
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
6.4
6
6
7
6
6
February
6.6
7
6
7
7
7
March
6.6
6
6
6
6
6
April
6.3
6
7
6
7
May
5.2
5
5
6
6
June
4.7
4
4
5
5
July
4.0
4
4
4
4
August
4.0
4
3
4
4
September
4.6
4
5
4
6
October
5.3
6
5
5
5
November
5.5
5
6
5
6
December
5.8
5
5
5
6
Average
5.5
6.2
5.1
5.2
5.1
5.4
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
296°
239°
320°
274°
077°
February
353°
241°
311°
340°
269°
March
358°
274°
220°
118°
219°
April
042°
186°
273°
313°
May
057°
183°
125°
214°
June
283°
016°
151°
193°
July
296°
217°
211°
233°
August
331°
204°
108°
270°
September
047°
026°
061°
065°
October
010°
002°
164°
070°
November
023°
021°
348°
035°
December
316°
209°
206°
267°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.