pcp_days

Average number of days of precipitation in month

This parameter is calculated as

$$d_{wet,i}=\frac{days_{wet,i}}{yrs}$$

where $d_{wet,i}$ is the average number of days of precipitation in month $i$, $days_{wet,i}$ is the number of wet days in month $i$ during the entire period of record, and $yrs$ is the number of years of record.