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
93.1
96
95
90
95
96
February
92.5
94
94
90
90
97
March
93.4
92
95
93
90
95
April
96.4
99
96
96
95
May
96.4
99
97
98
95
June
96.7
98
98
98
97
July
98.3
99
99
98
97
August
98.3
99
98
99
99
September
95.9
97
96
98
95
October
96.4
97
98
100
95
November
91.9
93
86
95
95
December
91.2
93
93
90
96
Average
95.1
94.1
96.7
94.8
95.8
95.9
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
23.1
23
25
22
23
24
February
26.5
24
28
26
27
25
March
27.8
28
29
29
27
29
April
29.8
30
30
29
30
May
31.7
32
32
32
31
June
32.5
33
33
32
32
July
33.4
34
34
33
33
August
33.4
34
34
33
33
September
32.2
32
32
32
32
October
30.1
29
29
30
30
November
24.9
27
13
25
27
December
23.3
23
10
27
23
Average
28.7
24.7
29.6
27.6
29.0
29.1
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
11.6
12
12
11
11
13
February
14.1
12
15
13
14
13
March
15.1
17
16
16
15
16
April
17.5
19
17
16
19
May
19.6
19
19
19
19
June
22.5
22
21
22
22
July
23.0
24
22
23
22
August
23.9
24
23
24
24
September
22.9
23
23
23
22
October
19.4
20
10
20
22
November
14.3
17
1
15
18
December
12.8
14
6
15
11
Average
17.8
13.7
18.6
15.3
18.0
18.4
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
2.1
6
0
3
1
1
February
2.6
5
2
3
2
3
March
1.6
2
1
2
2
0
April
2.3
4
1
1
4
May
2.7
2
2
0
5
June
5.3
1
5
5
6
July
3.4
4
4
5
3
August
3.3
2
1
5
3
September
4.4
3
9
4
3
October
2.3
2
1
3
5
November
3.8
4
5
5
7
December
3.1
7
1
1
1
Average
3.3
4.1
2.6
3.0
2.8
3.5
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
8.0
9
7
8
7
9
February
8.1
8
8
8
9
10
March
8.2
8
8
9
8
8
April
8.5
9
9
8
9
May
7.7
7
7
9
8
June
6.4
7
7
7
6
July
5.6
5
6
6
6
August
5.9
7
6
6
6
September
6.6
6
7
6
7
October
7.6
9
7
7
8
November
7.5
8
9
8
9
December
7.3
9
7
6
8
Average
7.3
8.1
7.4
7.4
7.2
7.6
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
035°
210°
342°
271°
060°
February
223°
184°
093°
201°
334°
March
142°
197°
153°
115°
134°
April
107°
096°
140°
219°
May
077°
121°
092°
079°
June
217°
085°
145°
106°
July
213°
136°
151°
141°
August
106°
130°
123°
119°
September
062°
067°
047°
094°
October
032°
035°
056°
069°
November
033°
027°
017°
059°
December
028°
034°
110°
015°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.