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
91.2
94
93
86
86
93
February
88.8
97
92
85
68
87
March
91.7
93
93
92
90
87
April
95.4
89
97
97
99
96
May
95.0
94
93
97
96
June
96.9
98
98
96
92
July
98.1
99
97
98
99
August
95.6
98
98
86
97
September
96.2
96
98
95
95
October
97.4
98
95
99
97
November
94.8
96
95
99
96
December
91.3
95
98
91
90
Average
94.0
93.2
95.8
94.5
92.4
94.1
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
14.4
16
17
12
13
16
February
16.2
17
19
16
13
14
March
18.8
22
20
19
18
19
April
22.3
24
25
22
22
22
May
25.6
25
27
26
25
June
28.9
29
31
29
27
July
31.5
34
33
30
31
August
30.8
33
32
30
30
September
28.9
30
30
28
28
October
25.1
26
24
26
25
November
19.5
20
21
19
21
December
16.1
18
16
18
15
Average
22.1
19.5
24.7
23.8
22.5
22.7
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
4.8
5
6
2
5
7
February
7.1
5
8
6
5
7
March
9.0
11
9
7
10
11
April
12.5
14
13
12
12
13
May
16.7
14
18
16
17
June
20.9
17
21
22
22
July
24.4
25
25
24
25
August
23.1
24
24
21
24
September
20.3
20
20
20
21
October
15.3
13
13
16
17
November
8.6
7
11
7
11
December
6.7
7
7
9
5
Average
13.0
8.5
13.5
14.1
13.8
14.9
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
4.4
0
4
8
10
4
February
6.6
0
7
7
19
13
March
3.9
0
6
5
3
8
April
3.6
0
5
3
2
6
May
5.9
11
5
2
3
June
5.5
3
2
7
12
July
5.4
4
9
7
4
August
5.6
5
6
6
8
September
4.4
2
4
7
9
October
2.1
0
2
4
4
November
3.2
0
7
2
5
December
4.9
0
2
7
5
Average
4.5
3.9
5.0
5.9
6.5
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
6.5
7
5
7
7
7
February
6.5
7
6
6
7
7
March
7.0
7
7
7
7
7
April
7.1
8
6
7
7
8
May
6.9
7
7
7
7
June
6.1
6
6
6
7
July
6.0
5
7
6
5
August
5.2
6
5
4
5
September
5.4
5
6
5
6
October
5.8
6
6
6
6
November
6.0
6
6
6
6
December
6.0
6
5
6
6
Average
6.3
7.1
6.1
6.3
6.2
6.3
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
277°
255°
325°
299°
302°
February
307°
258°
001°
348°
288°
March
313°
279°
223°
002°
265°
April
229°
194°
224°
245°
242°
May
318°
218°
200°
206°
June
205°
170°
200°
222°
July
212°
222°
212°
216°
August
216°
204°
192°
213°
September
345°
070°
063°
024°
October
353°
359°
304°
036°
November
006°
031°
344°
021°
December
322°
010°
277°
302°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.