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
90.6
94
88
93
90
85
February
84.0
91
91
81
70
81
March
92.4
88
94
87
95
87
April
95.1
97
94
90
98
97
May
95.8
96
95
97
95
June
94.5
92
98
95
98
July
91.7
90
91
90
89
August
93.0
99
83
95
95
September
94.5
94
91
91
94
October
93.7
95
96
95
94
November
88.8
89
84
96
92
December
85.2
92
74
87
90
Average
92.0
92.7
92.9
89.4
92.0
91.6
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
15.9
15
19
15
15
17
February
20.0
19
22
19
17
18
March
22.6
22
23
23
23
25
April
25.6
26
26
25
25
25
May
29.4
28
30
28
29
June
32.2
32
34
32
32
July
33.4
34
34
32
33
August
33.2
36
32
33
33
September
31.6
31
30
30
30
October
26.5
26
25
27
27
November
20.2
20
21
20
23
December
17.3
17
19
22
16
Average
25.1
20.3
26.1
25.8
25.2
25.7
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
4.4
2
6
2
6
7
February
8.2
6
11
4
6
7
March
10.4
10
11
9
11
14
April
12.4
13
13
12
12
12
May
17.4
17
19
16
16
June
21.5
21
23
21
21
July
22.8
24
24
23
24
August
23.1
24
23
23
23
September
20.5
20
19
20
21
October
14.7
13
10
16
16
November
7.5
8
9
6
11
December
6.4
5
10
10
3
Average
13.4
7.8
14.3
13.7
14.0
14.5
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
7.0
7
5
6
10
9
February
7.4
9
6
7
6
14
March
5.7
11
5
5
9
6
April
3.2
2
4
7
2
4
May
2.8
3
4
2
3
June
3.5
1
1
4
3
July
2.5
3
1
4
4
August
4.9
1
11
6
3
September
3.7
4
2
8
8
October
4.4
2
3
2
6
November
4.9
7
5
1
4
December
6.5
5
3
5
4
Average
4.9
7.3
3.7
4.4
4.6
5.4
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
6.9
8
7
7
7
7
February
6.8
7
8
6
7
7
March
7.0
7
7
7
7
6
April
6.8
7
7
7
6
7
May
5.6
6
6
7
6
June
5.3
6
5
6
6
July
4.6
4
5
4
5
August
4.6
5
4
5
5
September
5.3
5
6
5
7
October
6.1
6
6
5
6
November
5.9
6
7
5
7
December
6.3
7
6
6
6
Average
6.0
7.2
6.0
5.7
5.7
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
294°
250°
300°
276°
035°
February
249°
220°
128°
324°
261°
March
016°
242°
244°
113°
218°
April
227°
059°
188°
285°
295°
May
058°
175°
136°
098°
June
250°
005°
142°
121°
July
264°
197°
234°
215°
August
268°
194°
104°
203°
September
078°
043°
048°
058°
October
029°
017°
073°
054°
November
036°
022°
007°
030°
December
344°
204°
213°
309°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.