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
88.7
93
79
93
89
85
February
86.5
93
86
92
81
83
March
90.9
83
87
89
93
88
April
93.3
89
88
97
96
May
94.8
94
94
98
95
June
92.8
91
98
92
95
July
93.9
96
95
92
95
August
92.9
96
91
95
96
September
95.3
96
93
95
94
October
92.7
96
93
91
92
November
89.5
91
85
97
93
December
87.0
92
81
84
90
Average
91.5
88.9
91.0
91.5
92.2
92.1
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
15.3
13
17
15
15
16
February
19.3
19
21
19
16
17
March
22.0
22
22
23
23
24
April
25.1
25
25
24
25
May
28.9
27
30
28
28
June
31.5
31
34
31
31
July
32.9
34
33
32
33
August
32.5
35
31
32
33
September
31.0
31
30
29
29
October
26.0
25
25
26
26
November
19.8
20
20
19
22
December
16.8
16
18
20
15
Average
24.3
18.2
25.2
25.3
24.5
25.1
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
4.5
1
6
3
5
7
February
8.4
7
10
6
6
7
March
10.1
11
10
10
11
14
April
12.6
13
12
11
12
May
17.5
17
18
16
16
June
21.5
20
23
21
21
July
23.0
23
23
21
24
August
23.1
23
23
23
23
September
20.6
20
19
20
21
October
14.9
14
12
15
17
November
8.6
8
10
6
12
December
6.7
6
9
9
3
Average
13.4
6.7
14.2
14.0
13.6
14.7
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
8.1
5
8
9
12
10
February
7.8
8
8
7
7
14
March
6.7
15
6
5
7
9
April
4.6
7
4
4
6
May
3.9
4
3
2
3
June
5.8
5
3
8
5
July
3.0
2
4
4
3
August
4.3
2
5
6
2
September
3.5
5
3
3
7
October
5.4
4
2
7
4
November
5.3
8
6
1
5
December
7.9
9
6
7
6
Average
5.9
10.1
5.2
4.6
5.4
5.8
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
6.5
7
6
7
6
6
February
6.7
7
7
7
7
7
March
6.9
6
6
7
7
6
April
6.8
7
7
6
7
May
6.1
7
6
6
6
June
5.5
6
6
6
6
July
4.9
5
5
5
5
August
5.0
6
4
5
5
September
5.6
6
6
5
7
October
6.1
6
6
5
6
November
5.8
6
7
5
6
December
6.1
6
6
5
6
Average
6.1
6.9
6.1
6.0
5.6
6.1
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
318°
272°
301°
301°
041°
February
220°
256°
259°
348°
280°
March
025°
257°
243°
120°
240°
April
126°
260°
285°
320°
May
069°
231°
178°
023°
June
285°
037°
185°
258°
July
297°
249°
264°
272°
August
328°
243°
134°
210°
September
076°
072°
069°
079°
October
040°
008°
359°
089°
November
061°
052°
013°
054°
December
010°
141°
227°
320°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.