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
94.4
97
97
93
95
95
February
92.2
95
96
89
91
91
March
95.6
95
97
93
90
97
April
97.1
97
99
97
94
May
98.4
98
99
99
100
June
97.2
98
97
98
98
July
98.3
99
98
97
99
August
97.9
100
97
100
98
September
96.7
96
98
95
October
96.0
97
98
0
75
November
90.8
91
87
100
91
December
92.1
97
92
100
96
Average
95.7
95.6
96.9
94.7
95.4
95.5
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
21.1
21
23
20
21
22
February
24.5
22
27
24
24
24
March
25.7
26
27
27
25
28
April
27.6
29
27
27
28
May
29.9
30
30
30
30
June
31.4
32
32
31
31
July
32.4
33
33
30
33
August
32.7
34
33
30
33
September
31.0
31
31
31
October
28.2
28
27
19
28
November
24.7
24
25
21
26
December
22.1
22
23
21
21
Average
27.0
23.1
28.3
27.8
26.8
27.7
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
9.7
10
10
9
9
11
February
12.4
10
13
11
12
11
March
13.8
16
15
14
14
15
April
16.2
18
17
15
17
May
18.5
19
20
19
13
June
22.1
22
22
23
20
July
23.4
24
23
24
24
August
23.6
25
21
29
24
September
22.7
22
23
23
October
19.4
18
18
19
23
November
15.5
15
17
21
18
December
11.6
13
14
21
9
Average
16.6
12.0
17.7
17.4
16.7
17.0
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
3.0
4
1
5
1
1
February
3.7
7
1
7
4
4
March
2.6
3
1
5
5
0
April
2.9
4
1
4
6
May
3.3
2
0
2
4
June
5.2
3
2
11
9
July
3.7
5
2
5
2
August
3.6
4
4
0
4
September
5.4
3
9
7
October
3.7
2
2
0
15
November
5.5
6
8
0
10
December
4.3
3
4
0
3
Average
4.1
4.3
2.9
3.9
4.6
4.6
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
7.4
8
7
7
7
8
February
7.4
8
8
7
7
8
March
7.8
7
8
8
8
7
April
8.0
8
8
7
8
May
6.5
7
7
8
0
June
6.2
7
7
7
4
July
5.6
5
6
6
6
August
5.4
6
3
10
6
September
6.4
6
6
7
October
7.4
8
6
0
6
November
7.4
7
8
3
8
December
6.7
8
6
10
6
Average
6.9
7.4
7.0
6.4
7.1
6.0
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
247°
226°
320°
247°
025°
February
307°
206°
080°
216°
268°
March
123°
213°
172°
046°
160°
April
071°
093°
057°
188°
May
041°
107°
083°
360°
June
244°
087°
152°
142°
July
220°
163°
144°
147°
August
104°
112°
207°
148°
September
040°
038°
080°
October
014°
008°
360°
030°
November
009°
017°
270°
064°
December
346°
007°
006°
322°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.