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
98.7
96
99
100
99
100
February
97.8
94
100
100
99
100
March
98.0
94
99
100
96
100
April
98.1
100
97
100
100
99
May
98.4
100
100
100
100
99
June
100.0
100
100
100
100
100
July
99.5
100
98
99
100
100
August
99.2
96
100
100
99
100
September
99.7
100
100
100
100
October
99.4
100
99
100
99
November
99.8
100
99
100
100
December
98.8
100
97
98
100
Average
98.9
97.7
99.2
99.5
99.2
99.6
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
27.7
28
27
28
29
28
February
27.2
27
27
29
27
28
March
27.8
27
28
30
27
28
April
28.6
27
29
29
27
29
May
29.5
29
30
30
30
30
June
30.9
30
31
31
30
32
July
31.3
30
31
32
31
33
August
31.4
29
31
33
31
33
September
32.1
31
33
31
33
October
31.2
31
32
30
33
November
29.8
30
30
30
30
December
28.2
28
28
28
30
Average
29.6
28.1
29.3
30.3
29.1
30.5
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
16.8
19
15
18
17
19
February
18.2
18
19
17
17
19
March
18.1
19
19
19
15
20
April
19.8
19
17
22
19
20
May
19.4
20
20
21
18
20
June
21.4
22
21
22
21
23
July
21.8
22
21
23
23
23
August
21.5
21
22
23
21
24
September
22.4
22
23
22
22
October
20.9
20
23
21
22
November
20.2
21
21
19
22
December
19.3
20
19
20
19
Average
20.0
19.8
19.5
20.9
19.4
20.9
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
4.8
9
8
1
5
11
February
6.5
7
13
0
5
7
March
6.1
8
6
3
12
6
April
4.5
3
6
2
2
2
May
2.5
2
2
3
1
3
June
1.1
2
2
1
0
0
July
2.7
3
4
3
2
2
August
4.5
8
3
0
3
1
September
1.6
0
4
2
0
October
2.0
0
2
4
2
November
3.9
5
4
2
3
December
5.2
3
12
7
1
Average
3.7
4.9
4.1
2.6
3.5
3.0
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
10.3
12
7
8
13
11
February
11.2
12
12
11
12
12
March
11.2
14
10
11
12
11
April
12.9
14
12
16
12
11
May
12.6
13
13
13
13
14
June
14.4
16
15
15
14
15
July
15.8
17
17
17
17
16
August
15.4
17
17
15
15
17
September
13.9
15
14
16
15
October
11.5
11
12
15
9
November
11.8
12
13
11
13
December
11.6
12
12
11
11
Average
12.9
14.2
12.8
13.2
13.4
12.8
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
195°
021°
038°
057°
053°
February
044°
063°
041°
062°
047°
March
039°
127°
040°
054°
050°
April
050°
050°
056°
041°
044°
May
051°
051°
055°
053°
043°
June
039°
052°
046°
048°
054°
July
039°
048°
051°
050°
045°
August
038°
052°
045°
042°
046°
September
052°
040°
047°
045°
October
036°
036°
048°
036°
November
053°
046°
042°
054°
December
045°
056°
055°
048°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.