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
94.1
95
96
90
96
95
February
92.2
95
94
89
92
93
March
96.0
95
97
92
91
99
April
97.2
98
97
97
98
May
97.6
97
99
100
99
June
97.7
98
100
98
98
July
97.6
97
98
98
98
August
97.7
98
98
99
99
September
95.9
96
89
98
95
October
96.9
97
98
99
96
November
91.7
83
87
94
94
December
91.9
93
92
88
96
Average
95.7
94.8
95.4
94.5
96.0
96.7
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
20.9
21
23
20
20
22
February
23.9
22
26
23
24
23
March
25.0
25
26
26
25
27
April
26.7
28
27
26
28
May
29.1
29
30
29
29
June
31.2
32
32
31
30
July
31.9
33
33
31
32
August
32.1
33
33
32
32
September
30.7
31
30
31
30
October
28.3
27
27
29
29
November
24.4
24
25
23
26
December
22.4
22
23
25
21
Average
26.7
22.4
27.7
27.6
27.1
27.3
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
10.6
11
12
10
9
12
February
13.3
11
14
12
13
13
March
14.6
16
15
16
15
16
April
17.3
19
18
16
18
May
19.9
20
21
20
19
June
22.8
22
23
23
22
July
23.8
24
24
24
24
August
24.4
25
24
25
24
September
23.3
23
21
23
24
October
20.7
20
18
20
22
November
16.3
16
18
14
19
December
13.0
14
15
15
9
Average
17.7
12.7
18.7
18.5
18.1
18.4
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
4.3
7
1
7
2
4
February
4.9
9
2
6
2
7
March
2.9
3
1
6
5
0
April
3.6
6
1
3
7
May
4.5
5
2
3
4
June
4.3
3
3
3
7
July
4.1
5
4
6
4
August
2.9
2
2
3
4
September
7.7
6
16
5
8
October
5.3
4
1
2
6
November
7.5
12
12
8
9
December
5.7
9
5
3
3
Average
4.8
6.2
4.5
5.1
3.6
5.1
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
8.1
8
7
8
7
8
February
7.8
8
8
7
8
8
March
8.4
7
9
8
9
8
April
8.5
9
9
8
9
May
7.6
8
7
9
8
June
6.6
8
7
7
6
July
5.8
6
6
6
6
August
6.0
7
5
6
6
September
7.8
7
8
7
8
October
8.1
9
7
7
8
November
8.4
8
10
8
10
December
7.2
8
6
7
7
Average
7.5
7.7
7.8
7.4
7.3
7.5
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
309°
262°
318°
262°
012°
February
340°
250°
046°
281°
328°
March
046°
339°
187°
025°
147°
April
079°
076°
035°
195°
May
046°
074°
070°
064°
June
293°
078°
146°
072°
July
224°
145°
174°
155°
August
108°
095°
129°
131°
September
053°
042°
047°
069°
October
033°
018°
039°
056°
November
025°
016°
006°
055°
December
359°
025°
307°
322°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.