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
90.9
89
85
92
87
96
February
91.1
91
93
84
95
93
March
96.6
92
95
96
99
98
April
97.8
99
96
97
97
May
97.8
98
98
100
98
June
98.0
98
98
99
97
July
97.9
96
96
99
100
August
97.6
98
94
99
100
September
96.3
96
89
97
98
October
98.2
99
98
99
98
November
92.2
90
83
94
97
December
91.6
92
88
84
97
Average
95.3
90.5
95.1
93.0
96.2
97.6
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
21.2
21
22
21
20
22
February
24.7
23
25
23
24
24
March
25.9
27
27
27
25
28
April
28.1
29
28
27
28
May
30.5
30
31
31
30
June
31.8
32
32
32
32
July
32.4
33
33
32
33
August
32.6
34
32
32
33
September
31.6
32
30
31
31
October
29.6
29
28
29
30
November
25.7
26
26
24
27
December
23.1
23
24
25
21
Average
27.6
23.6
28.4
28.0
27.6
28.2
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
11.2
12
10
11
11
13
February
13.2
12
13
12
9
14
March
15.2
17
17
15
15
17
April
18.1
20
18
17
19
May
20.3
20
21
21
20
June
23.4
23
23
24
23
July
24.1
25
22
25
25
August
24.5
25
24
25
25
September
23.4
23
23
24
24
October
20.1
19
18
21
22
November
16.0
16
18
14
19
December
13.2
14
15
13
11
Average
18.0
13.5
18.8
18.5
18.2
19.1
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
5.4
8
7
8
3
3
February
5.0
12
4
6
4
2
March
3.0
5
4
7
1
1
April
4.4
7
6
4
8
May
4.1
4
4
1
3
June
7.5
7
9
7
8
July
8.3
13
10
5
8
August
7.8
10
7
6
5
September
7.6
5
14
8
8
October
5.2
5
9
4
4
November
8.5
12
17
5
8
December
5.8
11
4
3
4
Average
6.2
8.2
7.4
8.4
4.1
5.3
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
7.6
8
7
7
7
8
February
7.9
8
8
7
8
9
March
8.4
8
8
9
9
8
April
8.6
9
8
8
9
May
7.7
7
7
9
8
June
6.7
8
7
7
6
July
5.9
5
6
6
7
August
6.1
7
6
7
6
September
6.6
6
7
5
7
October
7.8
8
6
6
9
November
7.6
7
8
7
10
December
7.2
9
6
6
7
Average
7.4
8.2
7.4
7.0
7.2
7.7
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
083°
239°
001°
241°
102°
February
215°
204°
080°
225°
153°
March
160°
222°
195°
189°
171°
April
136°
102°
201°
227°
May
345°
212°
098°
126°
June
253°
119°
182°
157°
July
259°
175°
175°
185°
August
093°
156°
158°
163°
September
051°
034°
123°
107°
October
045°
045°
061°
099°
November
041°
029°
033°
096°
December
047°
055°
143°
070°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.