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
91.9
88
89
93
89
93
February
83.2
90
78
86
72
81
March
89.1
89
86
81
88
90
April
94.5
95
93
95
96
96
May
96.4
95
95
97
98
June
97.7
99
100
96
98
July
97.6
97
99
93
98
August
97.4
99
95
96
99
September
96.0
94
95
97
91
October
95.2
95
93
97
94
November
93.2
86
87
99
94
December
86.7
92
84
78
92
Average
93.3
90.4
92.3
92.4
92.1
94.0
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
17
20
17
16
19
February
20.6
19
22
20
19
20
March
22.4
23
23
22
22
25
April
24.7
25
25
25
24
25
May
28.0
28
28
28
28
June
30.3
30
32
30
31
July
31.2
31
31
31
32
August
31.4
34
31
31
31
September
30.3
30
30
29
30
October
27.5
26
26
27
28
November
22.6
22
23
21
25
December
19.3
18
21
22
18
Average
25.0
21.0
25.7
25.7
25.0
25.9
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
8.3
8
10
7
9
10
February
11.4
10
13
9
11
11
March
13.6
14
15
13
14
17
April
15.6
16
17
16
15
16
May
19.8
20
20
19
19
June
23.8
23
24
23
24
July
24.2
25
25
24
25
August
24.4
25
24
24
25
September
22.6
22
22
22
23
October
18.2
16
15
19
20
November
12.3
12
14
10
15
December
10.6
10
12
14
7
Average
16.5
12.1
17.4
16.8
17.0
17.6
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
7.5
7
8
14
10
8
February
7.8
8
7
9
15
8
March
4.8
7
2
9
5
2
April
4.3
3
5
3
7
9
May
3.7
2
6
3
4
June
6.0
4
4
5
6
July
5.7
5
10
4
7
August
7.2
3
8
8
8
September
6.7
9
4
9
12
October
5.2
4
3
7
2
November
4.6
11
6
3
0
December
7.9
12
2
4
11
Average
5.9
6.0
5.7
6.4
6.4
6.4
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
9.0
10
9
10
9
9
February
9.2
9
10
10
9
10
March
9.5
9
10
10
10
9
April
9.9
11
10
10
9
10
May
8.4
8
8
9
9
June
8.0
9
7
9
8
July
7.0
8
7
7
8
August
6.9
8
6
8
8
September
7.0
7
7
6
9
October
7.7
7
7
8
8
November
7.6
8
9
7
8
December
8.1
9
7
8
8
Average
8.3
9.7
8.4
8.2
8.2
8.7
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
071°
218°
359°
274°
098°
February
200°
184°
123°
116°
160°
March
151°
188°
181°
153°
187°
April
194°
181°
178°
185°
223°
May
222°
192°
162°
197°
June
238°
243°
202°
202°
July
254°
222°
233°
272°
August
258°
231°
182°
224°
September
108°
046°
153°
081°
October
031°
073°
041°
076°
November
044°
030°
025°
051°
December
047°
123°
160°
041°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.