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
92.3
91
93
95
92
93
February
89.4
92
92
86
88
90
March
89.0
88
67
92
93
96
April
95.1
95
97
95
94
May
95.1
96
96
97
97
June
93.9
96
98
93
95
July
93.6
89
98
92
95
August
82.8
90
53
96
97
September
91.1
96
92
92
94
October
93.1
94
95
97
89
November
87.7
86
86
98
87
December
88.4
93
88
83
94
Average
91.1
90.0
90.6
89.8
92.8
93.6
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
20.9
21
23
20
21
22
February
24.8
22
26
24
24
24
March
25.9
26
27
27
26
28
April
28.0
29
28
27
28
May
30.5
30
31
31
30
June
31.8
32
33
32
32
July
32.0
33
33
31
32
August
30.7
34
33
32
32
September
30.1
31
30
30
31
October
28.8
28
28
29
30
November
24.5
24
25
22
26
December
22.5
21
23
25
20
Average
27.1
22.9
28.1
27.8
27.6
28.1
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
7.8
9
9
8
7
9
February
10.8
8
12
10
11
10
March
12.0
14
13
13
13
13
April
14.9
17
16
14
17
May
17.5
17
19
17
17
June
21.2
21
22
22
21
July
22.0
22
23
22
23
August
20.9
22
23
23
23
September
20.5
21
20
21
22
October
17.7
17
15
18
20
November
13.3
13
16
10
17
December
10.5
11
12
12
6
Average
15.1
10.2
16.1
16.3
16.0
16.5
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
3.6
4
2
5
3
5
February
4.9
10
2
5
5
5
March
2.1
3
1
5
1
0
April
3.0
3
2
3
5
May
3.3
3
1
1
2
June
4.3
3
1
3
7
July
4.7
1
3
6
6
August
3.6
2
0
5
4
September
5.4
3
9
8
5
October
2.7
2
0
2
5
November
4.8
7
8
1
5
December
3.9
7
2
6
4
Average
4.0
5.5
2.7
3.2
3.6
4.4
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
4.3
5
4
3
3
5
February
4.2
5
5
3
3
5
March
4.5
4
6
4
3
4
April
4.3
5
4
2
5
May
3.6
4
3
3
4
June
2.9
4
2
2
3
July
2.0
3
1
2
2
August
2.2
4
1
1
2
September
3.2
4
3
2
3
October
4.0
5
4
2
3
November
4.4
5
6
2
5
December
3.5
5
4
1
3
Average
3.7
4.8
4.4
3.0
2.1
3.6
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
091°
192°
007°
233°
061°
February
111°
209°
079°
192°
138°
March
123°
201°
188°
073°
160°
April
094°
075°
091°
197°
May
048°
026°
092°
068°
June
241°
055°
143°
090°
July
238°
206°
155°
215°
August
123°
050°
137°
145°
September
050°
025°
064°
065°
October
043°
030°
083°
060°
November
034°
037°
035°
048°
December
041°
056°
080°
049°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.