| Percent Frequencies by Type of Cloud Cover | | Month | Clear | Scattered | Broken | Overcast |
| January |
8.1 % |
56.1 % |
31.6 % |
4.2 % |
| February |
6.6 % |
55.5 % |
32.4 % |
5.3 % |
| March |
6.8 % |
58.5 % |
30.1 % |
4.6 % |
| April |
6.6 % |
55.3 % |
33.7 % |
4.5 % |
| May |
3.6 % |
49.4 % |
38.8 % |
8.1 % |
| June |
2.4 % |
46.8 % |
42.8 % |
8.1 % |
| July |
1.9 % |
51.2 % |
42.5 % |
4.4 % |
| August |
1.6 % |
53.7 % |
39.1 % |
5.6 % |
| September |
1.6 % |
49.5 % |
42.3 % |
6.6 % |
| October |
2.8 % |
53.5 % |
37.8 % |
5.8 % |
| November |
4.8 % |
55 % |
35.8 % |
4.3 % |
| December |
6.5 % |
56.5 % |
32.7 % |
4.3 % |
| Annual |
4.4 % |
53.5 % |
36.7 % |
5.6 % |
|