5 day rainfall definition
Consequently, it may be possible, but not common, for a record daily rainfall to be concealed within an accumulated total. Mean number of days of rain â¥ 1, 10 or 25 mm. Number of days in a calendar month or year with at least 1, 10 or 25 mm of precipitation.n 10% of the years on record the monthly or yearly rainfall total did not exceed the decile 1 value. Median (decile 5) rainfall (mm). Monthly or annual median (decile 5 or 50th percentile) total precipitation.