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
2025
2024
2023
2022
January
98.2
95
99
98
100
February
100.0
100
100
100
100
March
100.0
100
100
100
100
April
99.7
100
100
99
May
98.0
99
100
95
100
June
93.6
85
95
95
98
July
92.0
88
97
91
August
89.6
93
91
85
September
93.2
95
87
98
October
92.3
96
91
92
November
96.2
97
96
96
December
94.1
100
88
100
Average
95.7
95.4
96.7
94.4
96.4
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
2025
2024
2023
2022
January
23.8
22.3
24.3
24.5
24.1
February
26.2
25.8
26.3
26.5
26.0
March
28.6
26.8
30.0
29.3
28.3
April
30.7
31.5
30.3
30.1
May
31.7
30.8
33.6
31.1
31.3
June
29.9
27.3
31.0
33.5
27.8
July
26.9
26.6
28.3
25.8
August
26.4
26.1
27.3
25.8
September
26.1
25.8
27.8
24.6
October
25.4
24.3
25.8
26.1
November
25.0
24.1
25.3
25.6
December
22.5
22.8
21.1
24.5
Average
27.0
26.6
27.2
27.5
26.8
Average highest temperature per day
The maximum temperature is typically observed some hours after noon.
Minimum temperatures (°C)
Month
Average
2025
2024
2023
2022
January
9.1
11.8
9.4
7.0
8.5
February
10.7
12.9
11.3
10.0
8.8
March
12.6
16.3
11.5
13.0
9.9
April
14.6
14.8
15.6
13.4
May
18.3
17.8
20.8
17.5
17.3
June
19.1
18.5
20.1
20.3
17.5
July
17.8
18.5
18.1
16.8
August
17.3
17.8
17.8
16.6
September
17.8
18.6
17.6
17.3
October
14.9
13.9
15.5
15.3
November
12.4
12.3
13.5
11.5
December
9.9
10.0
10.4
9.0
Average
14.7
15.5
14.9
14.7
13.6
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2025
2024
2023
2022
January
0.3
3
0
0
0
February
0.9
0
3
0
0
March
0.0
0
0
0
0
April
0.0
0
0
0
May
0.2
1
0
0
0
June
4.4
13
5
1
2
July
3.9
8
2
2
August
5.1
6
3
7
September
2.2
4
2
2
October
1.7
0
3
2
November
0.0
0
0
0
December
3.4
0
7
0
Average
2.1
3.6
2.3
1.6
1.2
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
2025
2024
2023
2022
January
3.6
4
3
4
3
February
4.3
4
4
4
5
March
5.6
7
6
5
5
April
6.0
6
7
5
May
5.4
6
5
6
5
June
5.0
5
4
5
6
July
3.8
4
4
4
August
3.4
3
4
3
September
3.9
5
2
5
October
3.5
4
3
4
November
3.5
3
4
4
December
3.2
2
3
3
Average
4.4
5.0
4.4
4.1
4.3
Average wind speed
Excluding wind gusts. Only observations between sunrise and sunset are taken into account.
Prevailing wind direction
Month
2025
2024
2023
2022
January
263°
266°
270°
304°
February
269°
284°
254°
286°
March
269°
275°
280°
271°
April
266°
275°
273°
May
259°
277°
284°
280°
June
082°
004°
240°
115°
July
088°
111°
126°
August
064°
097°
112°
September
084°
129°
090°
October
074°
106°
314°
November
102°
028°
305°
December
350°
034°
308°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.