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
81.4
78
80
90
89
76
February
81.7
95
87
88
84
84
March
89.6
88
87
95
93
81
April
90.1
88
87
94
88
87
May
93.4
94
95
86
98
June
96.8
100
99
94
98
July
98.1
100
100
92
99
August
97.8
100
95
97
100
September
95.9
99
99
98
92
October
92.6
93
96
92
92
November
87.4
83
78
92
91
December
86.4
90
77
91
91
Average
90.7
86.9
91.7
92.7
91.2
91.0
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
17.8
15
20
17
18
19
February
19.3
22
21
17
15
19
March
24.4
24
25
24
25
26
April
27.0
27
26
29
26
27
May
30.9
30
34
29
32
June
34.8
36
38
33
34
July
37.0
39
39
33
37
August
37.1
40
37
35
39
September
33.4
36
34
35
31
October
28.2
28
29
29
29
November
21.6
20
19
22
25
December
19.4
19
20
24
20
Average
26.9
21.9
28.3
28.5
26.8
28.0
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
6.2
4
8
5
6
9
February
8.1
11
9
4
4
8
March
13.2
14
14
10
12
16
April
15.6
17
15
17
15
15
May
20.1
20
22
20
20
June
23.5
24
24
24
23
July
24.3
25
26
22
26
August
24.8
25
25
25
25
September
22.2
24
22
22
20
October
15.4
16
15
16
16
November
11.1
11
11
11
13
December
8.6
8
12
14
7
Average
15.5
11.3
16.4
16.1
15.8
16.4
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
4.6
8
5
4
7
6
February
4.6
2
6
5
4
6
March
3.6
2
4
1
3
11
April
4.2
4
9
2
3
7
May
3.3
5
1
6
4
June
2.1
0
0
4
2
July
1.3
0
0
5
1
August
2.4
0
4
3
0
September
3.4
1
0
4
5
October
4.1
9
1
0
1
November
5.8
6
15
4
4
December
6.3
7
7
2
7
Average
3.7
4.0
4.3
3.1
3.8
4.1
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
4.4
4
4
4
4
4
February
5.1
5
5
5
5
5
March
5.3
4
5
6
6
4
April
5.2
5
5
6
5
4
May
4.7
4
5
5
5
June
4.2
4
4
3
4
July
3.9
4
4
3
4
August
4.0
4
4
4
4
September
3.7
4
3
3
4
October
4.1
5
3
4
4
November
3.9
4
4
4
4
December
4.0
4
4
4
4
Average
4.4
4.9
4.3
4.2
4.1
4.2
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
334°
330°
342°
323°
339°
February
267°
282°
347°
358°
345°
March
149°
148°
204°
142°
144°
April
153°
069°
150°
111°
099°
May
132°
162°
115°
145°
June
173°
162°
146°
160°
July
167°
164°
141°
160°
August
153°
149°
162°
165°
September
165°
118°
134°
016°
October
060°
181°
171°
343°
November
297°
020°
001°
081°
December
274°
342°
227°
296°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.