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
94.4
92
97
93
93
95
February
91.4
90
92
89
94
92
March
94.8
90
94
91
95
98
April
96.6
98
96
97
96
96
May
97.7
98
98
99
98
June
96.8
95
96
98
97
July
96.5
95
93
97
99
August
97.3
97
98
99
97
September
96.3
94
93
96
97
October
96.5
95
97
99
93
November
91.3
87
88
93
92
December
91.7
93
95
85
97
Average
95.1
92.5
94.6
94.0
95.7
96.2
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
21.3
21
24
20
21
23
February
25.0
22
27
24
25
25
March
26.3
26
28
27
26
29
April
28.1
27
29
28
27
29
May
30.8
30
31
31
31
June
31.9
32
33
32
33
July
32.7
33
33
33
33
August
33.1
34
33
33
33
September
32.1
32
31
32
32
October
29.7
28
29
31
30
November
25.1
24
26
24
26
December
22.8
21
24
26
21
Average
27.8
24.0
28.4
28.2
28.3
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
10.7
10
12
10
11
13
February
13.9
11
15
13
13
14
March
15.2
16
17
15
15
18
April
17.3
17
19
18
17
19
May
20.5
20
21
20
21
June
23.1
22
23
23
23
July
24.3
25
24
25
24
August
24.4
25
25
26
25
September
23.1
22
21
24
24
October
20.4
19
18
21
22
November
15.7
15
18
14
18
December
13.1
13
15
16
9
Average
17.9
13.5
18.5
18.5
18.6
18.9
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
2.7
2
2
4
1
1
February
3.4
11
1
3
2
4
March
2.4
4
1
6
1
1
April
2.3
2
3
2
2
5
May
2.6
2
1
1
4
June
4.3
2
2
6
5
July
4.4
4
3
8
2
August
3.8
3
3
5
4
September
5.5
5
14
5
4
October
2.2
2
0
1
5
November
5.3
16
7
5
4
December
4.2
8
3
3
2
Average
3.6
4.7
3.8
4.0
3.3
3.3
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
7.0
7
6
7
6
7
February
6.6
7
7
6
7
8
March
7.1
6
7
7
7
6
April
7.3
7
7
8
7
8
May
6.8
7
6
7
7
June
5.8
7
6
6
5
July
5.2
5
5
6
6
August
5.4
6
5
6
5
September
6.2
5
6
5
7
October
6.8
7
6
6
7
November
6.9
7
8
6
8
December
6.2
7
5
5
6
Average
6.5
6.8
6.5
6.3
6.1
6.5
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
301°
213°
334°
250°
035°
February
012°
219°
079°
212°
283°
March
157°
221°
176°
058°
170°
April
157°
075°
100°
086°
224°
May
062°
137°
086°
087°
June
240°
094°
154°
105°
July
232°
169°
161°
164°
August
145°
122°
155°
150°
September
055°
036°
057°
080°
October
029°
025°
041°
057°
November
028°
034°
007°
050°
December
010°
046°
035°
329°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.