| Percent Frequencies by Type of Cloud Cover | | Month | Clear | Scattered | Broken | Overcast |
| January |
16.1 % |
29 % |
40.3 % |
14.4 % |
| February |
16.6 % |
29.8 % |
40.5 % |
12.8 % |
| March |
16.8 % |
27.4 % |
45.5 % |
9.9 % |
| April |
16 % |
29.4 % |
46.4 % |
8 % |
| May |
8.4 % |
29.4 % |
50 % |
11.8 % |
| June |
4.6 % |
25.5 % |
51.2 % |
18.4 % |
| July |
9 % |
32.2 % |
47.6 % |
10.4 % |
| August |
7.7 % |
31.9 % |
51 % |
8.7 % |
| September |
6.3 % |
25.5 % |
53.1 % |
15 % |
| October |
12.3 % |
28.1 % |
44.1 % |
15.3 % |
| November |
13.2 % |
30.1 % |
44 % |
12.4 % |
| December |
15.5 % |
29.9 % |
41.3 % |
13.2 % |
| Annual |
11.8 % |
29.1 % |
46.3 % |
12.5 % |
|