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
88.8
83
83
92
93
86
February
85.6
95
87
84
76
87
March
92.5
83
90
98
92
94
April
96.3
96
99
97
94
May
98.9
99
99
98
100
June
98.3
100
98
98
97
July
98.3
99
98
99
97
August
98.4
99
99
97
100
September
98.6
100
99
98
95
October
96.5
97
99
99
96
November
89.9
82
84
99
89
December
85.5
96
76
84
97
Average
93.5
86.6
94.2
94.4
94.6
94.4
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
18.3
19
21
17
18
20
February
21.3
21
22
20
17
21
March
23.8
23
24
24
24
27
April
25.8
26
26
25
27
May
29.8
30
31
29
30
June
32.3
34
33
32
32
July
33.0
35
32
33
33
August
33.0
36
31
33
33
September
31.4
33
31
30
30
October
27.5
27
26
28
28
November
21.7
21
21
21
24
December
19.6
19
21
23
19
Average
25.8
21.1
27.2
26.2
26.0
26.9
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
9.1
8
12
7
9
12
February
12.4
12
14
10
8
12
March
15.1
15
16
13
15
19
April
17.2
18
18
17
18
May
21.5
22
23
22
22
June
24.8
25
26
25
25
July
25.5
26
25
26
26
August
25.4
27
25
26
25
September
23.8
25
23
23
24
October
19.5
19
17
21
20
November
12.9
14
13
12
16
December
11.4
11
14
15
9
Average
17.5
11.4
19.0
17.8
18.2
19.0
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
7.1
11
8
10
4
8
February
5.8
7
5
7
5
7
March
3.6
5
5
2
5
2
April
2.8
3
3
4
2
May
3.0
2
4
5
3
June
5.1
1
1
10
9
July
6.2
2
6
7
11
August
5.7
1
10
7
3
September
5.3
2
3
10
12
October
4.5
3
2
2
3
November
5.4
8
10
2
5
December
8.2
11
8
5
4
Average
5.4
7.4
3.9
5.2
5.5
5.5
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
8.4
9
8
9
8
8
February
8.8
9
9
9
8
9
March
8.9
9
9
9
9
9
April
9.1
9
10
9
9
May
7.7
7
8
9
8
June
7.1
8
6
8
7
July
5.9
6
5
5
7
August
6.1
7
6
6
7
September
6.6
6
6
6
8
October
7.9
8
7
8
9
November
7.2
7
8
6
8
December
7.4
7
7
7
8
Average
7.7
8.7
7.5
7.4
7.5
8.0
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
058°
166°
331°
304°
082°
February
171°
179°
088°
024°
180°
March
108°
152°
168°
123°
161°
April
090°
139°
104°
114°
May
098°
169°
122°
133°
June
227°
274°
149°
123°
July
242°
194°
195°
168°
August
285°
159°
096°
091°
September
059°
021°
087°
047°
October
050°
068°
109°
055°
November
034°
037°
034°
050°
December
032°
091°
165°
056°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.