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
87.0
83
87
86
87
93
February
80.7
92
89
78
70
86
March
86.3
85
69
91
87
89
April
91.2
93
89
94
90
88
May
95.8
97
99
94
99
June
92.9
99
100
76
88
July
99.2
99
100
98
99
August
92.5
99
99
100
50
September
85.0
99
99
99
0
October
85.8
96
97
96
29
November
86.8
81
75
97
97
December
88.7
96
79
96
96
Average
89.3
88.4
91.7
92.0
91.2
76.0
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
21.9
21
24
21
22
24
February
22.6
24
24
19
17
23
March
25.0
26
21
24
25
28
April
28.1
29
27
29
27
29
May
30.4
30
32
29
31
June
31.8
34
33
32
28
July
33.6
35
35
32
33
August
31.9
35
34
33
18
September
27.8
35
31
32
0
October
26.3
30
29
30
9
November
24.9
24
24
25
27
December
23.2
23
25
26
23
Average
27.0
24.6
28.5
28.0
27.6
22.8
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
12.6
11
16
11
12
16
February
13.7
15
14
10
8
14
March
17.6
19
15
15
16
21
April
20.1
19
20
22
20
22
May
23.0
23
24
23
23
June
24.5
26
25
25
22
July
25.9
27
26
25
26
August
24.0
26
26
26
11
September
20.6
25
24
24
0
October
18.1
22
21
20
5
November
16.2
16
17
16
18
December
14.0
13
17
18
12
Average
18.8
15.7
20.2
19.9
19.6
15.7
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
8.5
14
6
22
2
3
February
8.9
22
11
14
7
4
March
9.1
11
18
14
12
2
April
8.7
18
9
17
8
4
May
4.8
4
16
7
3
June
2.4
5
1
3
3
July
4.6
7
13
5
5
August
3.6
8
6
5
0
September
4.9
2
4
8
0
October
6.7
15
10
4
2
November
10.3
16
24
5
2
December
8.1
7
4
9
12
Average
7.3
15.9
8.9
12.4
6.0
3.2
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
11.4
11
12
11
10
12
February
12.7
12
13
12
13
13
March
12.9
12
11
14
13
14
April
13.7
14
13
14
13
13
May
13.2
10
15
13
14
June
11.9
13
12
11
10
July
12.0
12
13
10
13
August
11.3
12
12
11
5
September
8.6
10
8
10
0
October
9.7
12
9
10
4
November
10.8
10
12
10
10
December
10.8
9
11
12
11
Average
11.7
12.4
11.4
12.0
11.3
9.9
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
033°
125°
347°
103°
104°
February
128°
142°
023°
111°
120°
March
112°
120°
116°
101°
138°
April
131°
097°
131°
107°
103°
May
114°
137°
121°
125°
June
150°
123°
129°
125°
July
141°
136°
137°
142°
August
122°
128°
127°
097°
September
107°
071°
099°
360°
October
087°
093°
107°
014°
November
025°
002°
076°
093°
December
073°
138°
158°
132°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.