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
88.9
88
88
94
91
81
February
88.2
95
91
95
80
92
March
90.6
80
86
98
90
92
April
90.4
93
93
98
69
94
May
81.6
97
95
0
97
June
89.9
94
98
90
58
July
92.7
74
99
98
99
August
83.4
51
97
96
95
September
89.1
81
84
88
89
October
93.1
94
97
94
91
November
89.5
82
88
96
93
December
86.0
96
79
83
95
Average
88.6
88.6
85.3
94.1
80.2
89.0
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
17.7
17
21
17
18
20
February
20.9
22
23
21
17
21
March
24.2
24
25
24
24
27
April
26.1
28
26
27
25
27
May
29.9
31
32
28
30
June
31.9
34
34
32
31
July
33.0
35
33
33
32
August
33.3
37
32
33
33
September
31.7
34
32
30
30
October
27.7
28
28
29
28
November
22.2
22
22
22
25
December
19.7
19
22
24
19
Average
26.2
22.6
27.7
27.1
26.0
27.0
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
7.1
6
11
5
8
11
February
10.5
10
13
8
7
10
March
13.5
13
14
11
14
18
April
15.1
16
17
15
15
16
May
19.7
20
21
19
21
June
21.3
23
24
18
22
July
23.8
25
24
24
24
August
23.9
25
24
24
24
September
21.7
22
21
21
22
October
16.8
16
14
19
18
November
10.4
11
11
9
13
December
9.6
8
13
14
7
Average
15.8
11.3
16.7
15.9
15.7
17.4
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
4.7
5
5
4
3
6
February
5.7
5
4
4
5
5
March
3.1
5
4
1
4
1
April
2.5
3
3
1
4
2
May
2.4
2
2
0
4
June
4.9
1
2
8
4
July
5.9
1
4
6
9
August
5.2
0
7
6
4
September
4.6
2
3
6
11
October
3.6
3
2
2
4
November
3.7
7
6
3
2
December
6.6
6
5
5
2
Average
4.3
4.1
2.9
3.1
4.2
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
5.6
6
6
6
6
6
February
6.1
6
7
6
5
7
March
6.2
6
6
7
7
6
April
5.8
6
6
7
6
6
May
4.6
4
5
5
5
June
4.3
4
3
5
5
July
3.4
4
3
3
4
August
3.4
4
3
3
4
September
3.5
3
3
4
5
October
4.6
6
4
4
5
November
4.2
4
5
3
4
December
4.9
4
4
5
5
Average
4.8
5.8
4.8
4.7
4.5
5.0
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
001°
209°
326°
312°
075°
February
229°
210°
006°
026°
270°
March
121°
192°
198°
165°
192°
April
171°
128°
165°
121°
113°
May
144°
188°
143°
198°
June
232°
260°
187°
178°
July
238°
212°
231°
234°
August
232°
182°
038°
292°
September
066°
033°
060°
060°
October
043°
079°
074°
060°
November
040°
041°
018°
058°
December
037°
143°
186°
014°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.