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
93.2
92
94
89
94
94
February
91.6
89
97
87
95
92
March
96.2
93
98
94
93
98
April
96.7
97
96
96
97
May
97.1
96
100
98
96
June
96.9
96
97
98
97
July
97.2
98
97
96
97
August
96.7
98
94
98
98
September
95.1
93
89
98
96
October
97.3
96
98
98
98
November
91.4
80
89
96
94
December
91.7
95
95
86
97
Average
94.9
91.5
95.0
93.7
95.6
96.2
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
22.0
22
24
21
22
23
February
25.4
23
27
25
26
25
March
26.5
27
28
27
26
29
April
28.4
29
28
27
29
May
30.8
30
31
31
31
June
32.3
32
33
32
32
July
33.0
34
33
32
33
August
33.0
34
33
33
33
September
31.7
32
31
31
32
October
29.2
28
28
30
30
November
25.4
25
26
24
27
December
23.3
22
24
26
22
Average
27.9
23.8
28.7
28.5
28.3
28.8
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
11.0
11
12
10
11
13
February
13.8
12
15
13
14
14
March
15.1
16
17
16
15
17
April
17.5
19
17
17
19
May
20.1
20
20
20
20
June
23.0
22
23
23
23
July
24.1
25
24
23
25
August
24.5
25
24
24
25
September
23.2
23
23
23
24
October
20.2
18
19
20
21
November
16.5
16
18
15
19
December
13.4
14
15
16
10
Average
17.9
12.9
18.7
18.6
18.3
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
3.6
4
2
7
1
2
February
4.4
10
2
5
6
2
March
1.8
2
2
3
1
1
April
3.4
5
2
5
6
May
3.8
5
1
1
3
June
4.5
2
3
5
6
July
3.7
4
4
6
4
August
3.7
4
3
4
6
September
6.9
4
13
4
7
October
3.3
3
1
3
5
November
6.5
14
12
4
7
December
4.1
5
2
4
1
Average
4.2
5.2
4.1
4.6
3.7
4.1
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
8.3
8
7
8
8
8
February
8.0
8
8
8
9
9
March
8.6
8
9
9
9
8
April
9.0
9
9
8
9
May
8.1
8
8
9
9
June
7.1
8
7
8
6
July
6.3
7
6
7
7
August
6.7
7
6
7
7
September
7.4
7
8
7
7
October
8.0
9
7
7
8
November
7.9
8
9
8
10
December
7.4
9
7
6
7
Average
7.7
8.0
7.8
7.6
7.6
7.8
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
275°
268°
312°
261°
024°
February
328°
231°
073°
222°
266°
March
237°
244°
174°
043°
157°
April
103°
096°
044°
223°
May
068°
110°
083°
071°
June
283°
089°
149°
091°
July
259°
141°
172°
151°
August
128°
112°
139°
145°
September
067°
035°
049°
078°
October
039°
025°
040°
056°
November
036°
032°
360°
060°
December
012°
028°
275°
318°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.