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
92.1
89
89
94
93
94
February
92.6
97
96
90
94
94
March
96.7
94
97
97
98
98
April
97.2
98
98
94
98
97
May
98.1
97
98
99
100
June
97.8
97
98
99
98
July
97.7
97
98
100
98
August
97.2
95
97
98
99
September
96.4
95
91
97
98
October
98.2
98
100
99
97
November
92.8
92
82
96
95
December
90.9
94
91
85
96
Average
95.8
94.2
95.5
94.3
96.4
97.1
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
20.7
20
22
21
20
22
February
23.7
21
25
23
23
24
March
24.9
25
26
26
25
27
April
27.3
27
28
27
27
28
May
29.5
29
30
30
29
June
31.1
31
32
31
32
July
32.2
32
33
32
32
August
32.4
33
32
32
32
September
31.2
31
30
31
31
October
29.0
28
28
30
30
November
24.9
24
25
24
26
December
22.3
21
23
25
21
Average
27.0
23.3
27.5
27.5
27.4
27.6
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
13.6
13
13
14
14
15
February
16.0
14
18
16
15
15
March
17.8
19
18
19
16
20
April
19.7
21
22
21
20
22
May
21.3
23
23
23
23
June
24.2
26
26
25
26
July
26.3
27
25
26
27
August
26.2
28
26
26
27
September
25.5
24
25
26
26
October
23.5
23
21
25
24
November
18.8
18
20
18
21
December
16.2
15
17
19
14
Average
20.3
16.6
21.2
21.1
21.0
21.5
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
2.9
5
2
5
2
2
February
3.3
8
1
5
3
3
March
1.7
2
1
4
2
0
April
2.4
1
3
4
2
6
May
3.0
4
1
1
2
June
4.1
4
3
4
6
July
4.5
3
2
5
4
August
5.6
5
6
5
6
September
5.6
3
11
7
8
October
2.8
1
3
3
4
November
5.3
9
12
3
6
December
4.1
6
1
1
3
Average
3.7
3.4
3.5
4.8
3.2
4.0
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
8.2
9
7
8
8
8
February
7.9
8
8
7
9
9
March
8.7
9
9
9
9
8
April
8.9
9
10
9
8
9
May
8.4
7
8
10
9
June
7.6
8
8
8
7
July
7.0
6
7
7
8
August
7.2
8
7
8
7
September
7.9
7
8
7
9
October
8.8
9
6
8
9
November
8.3
8
9
8
11
December
7.6
9
7
6
7
Average
8.1
8.7
8.0
7.7
8.1
8.5
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
024°
008°
025°
254°
063°
February
051°
205°
024°
247°
065°
March
133°
211°
186°
106°
163°
April
142°
119°
090°
177°
219°
May
040°
174°
088°
077°
June
258°
136°
174°
124°
July
258°
169°
181°
200°
August
153°
137°
141°
145°
September
076°
045°
123°
092°
October
040°
039°
065°
063°
November
042°
027°
030°
056°
December
034°
059°
082°
021°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.