| Percent Frequencies by Type of Cloud Cover | | Month | Clear | Scattered | Broken | Overcast |
| January |
2.4 % |
30.6 % |
36.8 % |
30.1 % |
| February |
2.3 % |
27.3 % |
36.6 % |
33.8 % |
| March |
3 % |
30.8 % |
35.8 % |
30.4 % |
| April |
3.4 % |
38.6 % |
31.4 % |
26.5 % |
| May |
3.3 % |
38.9 % |
31.5 % |
26.3 % |
| June |
1.4 % |
38 % |
35 % |
25.6 % |
| July |
1.3 % |
54.8 % |
30.5 % |
13.3 % |
| August |
1.9 % |
57.3 % |
29.7 % |
11.2 % |
| September |
2.1 % |
39.1 % |
32.8 % |
26 % |
| October |
2.1 % |
39.1 % |
32.8 % |
26 % |
| November |
2.5 % |
40 % |
34 % |
23.5 % |
| December |
2.3 % |
35 % |
35.7 % |
26.9 % |
| Annual |
2.3 % |
40 % |
33.5 % |
24.2 % |
|