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
85.9
81
83
84
86
85
February
83.4
95
87
90
80
84
March
90.5
89
90
95
87
88
April
92.1
89
96
90
83
May
97.8
98
99
95
100
June
99.0
97
100
100
99
July
99.3
100
100
98
99
August
98.7
96
98
100
100
September
99.1
100
100
99
97
October
95.1
96
98
97
97
November
89.4
87
76
97
95
December
89.0
95
73
92
98
Average
92.9
87.8
93.2
93.3
93.7
93.8
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
19
23
20
21
22
February
22.5
24
24
20
19
23
March
25.8
27
27
25
26
28
April
27.9
27
30
26
29
May
30.6
31
32
29
31
June
33.1
35
34
33
31
July
34.2
36
35
33
34
August
34.9
37
34
34
35
September
33.1
36
34
33
32
October
29.3
29
30
30
30
November
24.1
23
22
25
27
December
22.1
23
23
26
23
Average
27.6
23.2
29.3
28.2
27.7
28.6
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
9.8
9
12
8
10
13
February
11.7
13
13
6
8
11
March
16.1
17
18
11
15
19
April
18.5
19
21
18
19
May
21.9
23
23
21
22
June
24.3
25
24
24
23
July
24.4
26
24
24
25
August
24.5
26
26
25
23
September
23.5
24
24
22
23
October
18.7
20
18
20
16
November
14.1
15
14
13
16
December
11.7
12
16
15
9
Average
17.6
12.9
19.3
18.0
18.0
18.2
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
8.4
12
7
7
8
11
February
8.6
5
7
6
13
10
March
5.6
5
7
4
8
4
April
4.8
7
4
6
6
May
2.5
3
2
4
3
June
2.8
0
2
5
4
July
2.4
3
0
8
5
August
3.9
5
7
2
1
September
4.4
1
5
3
4
October
5.2
9
4
2
2
November
9.5
15
16
4
3
December
8.0
9
13
3
2
Average
5.6
7.2
5.8
5.2
5.2
4.4
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
11.6
11
12
10
11
12
February
12.8
13
14
13
13
13
March
14.0
12
15
15
14
15
April
13.5
11
16
12
12
May
11.9
8
15
11
11
June
10.0
10
10
9
10
July
10.1
12
11
8
11
August
10.5
12
10
9
9
September
9.4
9
7
9
10
October
10.5
11
11
10
10
November
10.5
10
12
10
10
December
10.5
9
11
12
11
Average
11.4
12.1
11.1
11.8
10.6
11.2
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
035°
101°
023°
078°
118°
February
136°
126°
046°
095°
114°
March
117°
122°
125°
102°
135°
April
101°
135°
109°
099°
May
112°
148°
123°
133°
June
151°
138°
138°
128°
July
147°
147°
146°
139°
August
134°
138°
136°
136°
September
122°
088°
105°
042°
October
097°
102°
109°
095°
November
053°
049°
098°
091°
December
066°
125°
152°
175°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.