how to find the regularity of rainfall over a month yearly rainfall of a month what's the rainfall for a month what is monthly rainfall what is the average monthly rainfall average monthly rainfall what is the average monthly rainfall for two days of a month what is a measure of average rainfall what is the average monthly rainfall in a month what is the standard deviation of rainfall how is rainfall calculated in meteorology what is the average monthly rainfall what is the monthly rainfall how can i measure rainfall what is a normal rainfall what is the average monthly rainfall in a month how to show rainfall monthly rainfall formula in meteorology how do you figure monthly rainfall average monthly rainfall