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
94.1
94
93
89
95
95
February
87.9
93
89
86
78
90
March
94.3
94
96
90
90
95
April
96.8
99
95
99
99
95
May
97.3
96
100
98
98
June
95.5
96
100
99
96
July
97.7
97
98
96
99
August
98.0
99
98
97
99
September
97.1
97
92
98
99
October
96.0
97
88
99
94
November
89.6
84
81
91
93
December
90.1
95
94
91
94
Average
94.9
95.3
94.7
93.3
94.6
95.7
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
18.8
19
22
18
19
20
February
21.4
20
25
20
20
20
March
23.1
24
25
23
23
25
April
25.5
27
27
25
25
25
May
28.5
28
29
29
28
June
30.4
32
32
31
30
July
31.8
34
32
31
33
August
31.5
34
32
29
31
September
30.4
31
30
30
29
October
24.9
25
23
27
24
November
22.0
22
23
21
24
December
20.0
19
21
23
18
Average
25.3
22.5
26.9
25.8
25.6
25.6
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
10.1
10
11
9
10
12
February
12.7
12
14
11
10
12
March
14.1
16
16
14
13
16
April
17.0
18
20
18
16
16
May
19.8
21
21
20
20
June
21.3
22
25
24
18
July
21.5
26
12
23
23
August
23.1
26
23
19
25
September
23.1
25
24
23
19
October
13.9
15
11
21
11
November
13.2
14
17
13
16
December
11.8
13
15
13
9
Average
16.4
13.9
18.6
16.6
17.1
16.2
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
4.1
4
1
6
4
2
February
6.8
11
3
10
9
7
March
4.7
6
4
10
7
1
April
4.0
2
10
2
4
5
May
3.6
5
2
3
4
June
4.5
3
1
6
7
July
4.2
4
4
7
2
August
4.6
2
4
6
4
September
6.9
5
14
4
8
October
3.9
3
1
3
6
November
6.9
14
10
8
6
December
6.4
4
3
3
3
Average
5.0
5.5
4.8
5.5
5.1
4.5
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
8.9
9
8
10
9
10
February
9.3
10
9
9
10
10
March
9.7
9
10
10
11
9
April
10.0
10
11
11
10
9
May
9.5
10
10
11
10
June
8.4
9
9
10
8
July
7.8
8
8
8
8
August
7.7
8
8
7
8
September
9.9
10
11
8
11
October
9.6
10
9
8
10
November
10.0
10
12
10
11
December
8.5
9
8
8
8
Average
9.1
9.3
9.4
9.5
9.2
9.2
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
318°
264°
342°
286°
011°
February
018°
273°
038°
021°
348°
March
067°
329°
180°
039°
132°
April
153°
077°
105°
205°
177°
May
060°
119°
098°
092°
June
256°
093°
169°
098°
July
212°
169°
196°
158°
August
137°
115°
152°
146°
September
056°
042°
066°
073°
October
019°
018°
038°
041°
November
023°
019°
005°
045°
December
002°
030°
340°
322°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.