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
82.7
95
91
93
90
90
February
82.0
93
91
92
73
87
March
92.1
89
93
88
91
89
April
95.8
96
88
97
95
97
May
95.7
95
94
97
95
June
94.2
93
97
95
96
July
94.1
94
98
91
93
August
96.1
99
94
93
97
September
94.7
95
97
89
89
October
93.6
92
94
100
91
November
88.9
87
89
96
86
December
84.8
91
81
74
89
Average
91.7
93.0
92.7
93.5
90.0
91.9
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
17.8
17
20
17
16
19
February
21.7
20
24
20
19
20
March
24.0
23
24
24
24
27
April
26.4
27
26
26
24
27
May
30.2
29
30
29
29
June
32.8
31
35
32
32
July
33.1
33
33
32
33
August
33.1
36
32
32
33
September
31.7
31
31
30
30
October
27.8
27
27
20
28
November
22.2
22
23
21
25
December
19.0
18
21
22
17
Average
26.0
21.6
26.7
26.7
25.5
26.5
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
6.4
5
8
4
7
8
February
9.8
8
12
7
8
9
March
11.6
12
12
11
12
14
April
13.9
14
15
14
13
14
May
18.4
17
19
17
17
June
22.2
21
23
22
22
July
23.2
23
23
22
23
August
23.0
23
23
23
23
September
20.8
20
20
21
21
October
15.8
14
12
12
18
November
9.9
9
11
7
13
December
8.4
7
10
12
4
Average
14.6
9.5
15.1
14.8
14.5
15.5
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
4
5
5
12
9
February
3.8
9
4
3
7
8
March
2.8
6
2
6
6
3
April
2.0
2
4
2
6
3
May
1.1
2
4
1
2
June
2.0
2
1
6
6
July
2.5
3
6
3
5
August
2.5
3
5
5
3
September
3.1
3
3
8
10
October
1.5
2
1
0
2
November
3.5
9
5
3
2
December
4.1
8
1
3
6
Average
2.9
4.9
3.6
3.4
5.1
4.7
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
6.6
9
8
8
7
8
February
6.8
8
9
8
8
9
March
6.9
8
9
9
8
8
April
6.6
8
8
8
7
9
May
5.6
7
7
8
7
June
4.9
7
6
7
7
July
4.7
5
6
5
7
August
5.5
7
5
7
6
September
6.4
7
7
6
8
October
7.1
8
6
9
8
November
6.7
8
9
6
8
December
6.6
8
7
7
7
Average
6.3
8.0
7.5
7.0
6.9
7.5
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
309°
243°
322°
281°
040°
February
247°
232°
126°
347°
231°
March
006°
238°
212°
162°
218°
April
219°
101°
188°
257°
285°
May
039°
221°
162°
123°
June
239°
021°
177°
177°
July
256°
231°
234°
233°
August
300°
192°
138°
217°
September
067°
044°
097°
063°
October
040°
024°
278°
069°
November
032°
044°
023°
049°
December
026°
036°
212°
317°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.