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
84.7
84
65
93
85
89
February
84.2
88
82
84
77
85
March
87.2
81
84
76
93
87
April
92.3
83
90
98
96
May
91.9
86
92
97
97
June
92.8
92
95
86
96
July
87.3
91
91
93
93
August
90.6
92
91
92
91
September
94.4
96
94
93
92
October
91.5
93
90
92
91
November
88.7
92
82
99
92
December
81.0
81
63
80
86
Average
88.7
84.0
87.0
87.6
90.7
91.4
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
15
16
14
14
17
February
18.9
17
20
19
16
17
March
21.6
21
21
23
23
23
April
25.1
24
25
25
25
May
29.0
26
30
29
28
June
31.8
30
34
31
31
July
31.4
33
33
32
34
August
32.7
33
31
33
33
September
30.6
29
29
30
29
October
26.0
25
24
26
27
November
19.4
19
20
19
23
December
16.3
16
15
20
14
Average
24.1
17.7
24.5
25.0
24.8
25.2
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
5.8
4
8
4
5
8
February
8.8
7
10
8
6
8
March
10.6
11
10
11
11
13
April
13.8
13
13
14
14
May
18.6
17
20
17
18
June
21.7
20
24
22
22
July
22.2
24
24
24
25
August
23.3
23
23
23
24
September
20.7
20
20
20
21
October
15.9
14
13
17
17
November
9.4
9
11
8
13
December
7.5
7
8
11
5
Average
14.0
7.4
14.6
14.9
14.9
15.6
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
8.3
7
12
7
9
9
February
9.5
11
12
6
11
18
March
7.4
11
10
8
4
9
April
5.9
12
3
2
6
May
5.4
11
3
3
4
June
4.0
4
3
7
3
July
3.5
6
7
2
5
August
5.6
7
9
5
5
September
4.0
5
3
6
7
October
4.2
4
2
5
2
November
6.2
8
14
1
3
December
12.7
18
15
8
9
Average
6.5
9.8
8.8
6.4
5.0
6.2
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
5.8
6
5
6
5
6
February
6.1
6
6
6
6
6
March
6.6
6
6
7
7
7
April
6.3
6
6
6
7
May
5.9
6
6
6
6
June
5.3
5
6
6
6
July
4.4
4
5
4
5
August
4.7
5
4
5
4
September
5.6
5
6
4
6
October
5.4
5
5
5
5
November
5.5
6
6
6
6
December
5.4
6
5
5
5
Average
5.6
6.0
5.4
5.7
5.4
5.6
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
240°
224°
329°
304°
339°
February
192°
240°
190°
323°
263°
March
344°
220°
223°
076°
222°
April
091°
211°
254°
244°
May
032°
191°
135°
274°
June
308°
073°
140°
318°
July
263°
215°
187°
208°
August
021°
135°
117°
185°
September
056°
050°
046°
031°
October
017°
037°
342°
047°
November
040°
059°
352°
034°
December
079°
048°
241°
285°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.