| Percent Frequencies by Type of Cloud Cover | | Month | Clear | Scattered | Broken | Overcast |
| January |
0.7 % |
60.2 % |
38.2 % |
0.9 % |
| February |
0.5 % |
57.3 % |
41.2 % |
0.9 % |
| March |
0.3 % |
56.8 % |
41.9 % |
1 % |
| April |
0.1 % |
52.3 % |
44.9 % |
2.7 % |
| May |
0 % |
44.1 % |
51.6 % |
4.2 % |
| June |
0 % |
37.2 % |
57.5 % |
5.2 % |
| July |
0 % |
44.9 % |
50.6 % |
4.5 % |
| August |
0.1 % |
45.6 % |
50.6 % |
3.7 % |
| September |
0.3 % |
47.9 % |
46.6 % |
5.1 % |
| October |
0.3 % |
49 % |
45.5 % |
5.2 % |
| November |
0.3 % |
52.1 % |
43.2 % |
4.4 % |
| December |
0.2 % |
56.2 % |
40.9 % |
2.7 % |
| Annual |
0.2 % |
50.2 % |
46.2 % |
3.4 % |
|