| Percent Frequencies by Type of Cloud Cover | | Month | Clear | Scattered | Broken | Overcast |
| January |
12.5 % |
51.7 % |
29.9 % |
5.9 % |
| February |
10.8 % |
52.4 % |
29.8 % |
6.9 % |
| March |
11.3 % |
55.5 % |
28.1 % |
5.1 % |
| April |
11 % |
56.4 % |
27.9 % |
4.8 % |
| May |
6.3 % |
54.4 % |
31.9 % |
7.4 % |
| June |
4.2 % |
46.9 % |
40.3 % |
8.6 % |
| July |
2.6 % |
55.7 % |
37.5 % |
4.2 % |
| August |
2.1 % |
57.1 % |
35.9 % |
4.9 % |
| September |
2.5 % |
52.7 % |
39.5 % |
5.3 % |
| October |
4.6 % |
56 % |
32.8 % |
6.6 % |
| November |
7.5 % |
55.1 % |
32.5 % |
4.8 % |
| December |
9.8 % |
53.6 % |
31.9 % |
4.6 % |
| Annual |
7.1 % |
54 % |
33.2 % |
5.8 % |
|