The cloud coverage diagram reports, for every month of the year the frequency of "clear", "cloudy" or "intermediate" conditions.
As the Cloud cover is reported in tenths of coverage (i.e. 0 is 0/10 covered. 10 is total coverage) for the purpose of this graph we have simplified the scale as per the table below.
Categorization
Color
Tenth of coverage
Clear (BELOW range)
0
Clear (BELOW range)
1
Clear (BELOW range)
2
Clear (BELOW range)
3
Intermediate (IN range)
4
Intermediate (IN range)
5
Intermediate (IN range)
6
Intermediate (IN range)
7
Cloudy (ABOVE range)
8
Cloudy (ABOVE range)
9
Cloudy (ABOVE range)
10
Example cloud coverage graph for San Francisco, USA
