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
80.3
74
70
73
84
79
February
73.5
88
74
80
73
78
March
82.1
78
80
90
77
75
April
86.6
91
79
89
79
77
May
94.7
92
99
92
92
June
97.4
96
99
99
95
July
97.7
99
99
91
98
August
96.5
92
98
98
100
September
96.5
99
97
99
96
October
93.6
91
99
96
97
November
87.5
83
81
95
92
December
85.5
93
72
83
96
Average
88.9
82.7
87.2
90.5
89.3
89.6
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
19.4
18
21
19
20
22
February
20.8
22
21
18
18
22
March
24.1
24
25
24
24
27
April
26.6
27
26
28
26
29
May
29.6
29
31
28
31
June
32.0
32
34
32
32
July
32.8
34
34
32
33
August
33.1
35
33
33
34
September
31.2
34
32
32
26
October
28.4
28
29
30
28
November
22.9
22
20
24
26
December
21.1
22
22
24
21
Average
26.4
22.6
27.3
27.2
26.9
27.5
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
10.6
9
12
9
11
15
February
12.0
13
12
7
10
11
March
16.6
17
18
13
16
20
April
19.2
21
18
22
19
20
May
22.3
23
25
22
18
June
25.6
26
27
25
25
July
26.1
27
28
26
25
August
25.3
24
27
27
27
September
23.4
26
23
24
17
October
19.7
20
20
22
16
November
14.2
15
12
15
17
December
12.4
11
16
17
11
Average
18.5
15.0
19.2
19.4
19.6
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
5.5
7
5
11
3
5
February
2.9
2
1
5
2
2
March
3.3
2
6
2
4
1
April
3.6
1
6
6
9
3
May
1.0
1
1
2
1
June
2.7
0
1
2
2
July
2.2
1
1
7
3
August
3.0
2
6
1
1
September
5.6
2
5
6
6
October
3.7
9
3
2
2
November
7.2
11
13
4
6
December
4.6
2
6
2
3
Average
3.6
2.9
3.7
4.6
3.7
2.6
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
9
8
9
9
February
9.3
9
9
10
10
9
March
10.3
9
11
11
11
10
April
11.1
11
10
12
12
11
May
10.6
9
12
12
10
June
9.6
10
9
9
9
July
8.9
9
10
8
10
August
8.8
9
9
8
8
September
8.7
8
7
8
10
October
9.0
9
8
8
9
November
8.2
7
9
8
9
December
8.1
8
8
8
8
Average
9.4
9.7
9.0
9.5
9.1
9.4
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°
076°
022°
061°
095°
February
114°
117°
023°
083°
083°
March
105°
118°
108°
095°
125°
April
133°
103°
131°
107°
095°
May
116°
145°
119°
130°
June
154°
142°
137°
130°
July
153°
150°
141°
139°
August
142°
142°
138°
140°
September
128°
103°
096°
038°
October
077°
096°
106°
100°
November
046°
055°
080°
081°
December
063°
101°
143°
050°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.