Skip Navigation Links



What is the moving average SPI?

For SPI-n you should calculate average of last n month for each month. In fact, the SPI-n is monthly that each month of rainfall is equal to average of last n month for each month. For example you want to calculate 12-month moving average of Mar-2000, you should calculate average of monthly rainfall from Apr-1999 to Mar-2000 and for calculating 12-month moving average of Apr-2000, then calculate average of monthly rainfall from May-1999 to Apr-2000. After the process done, you will have 12 number of rainfall for each year and you should calculate SPI with these data.

Simple Moving Average Formula

Simple Moving Average Formula

Simple Moving Average Formula


Name: Hidden

Help Pages of Tools



Copyright (c) 2019 AgriMetSoft. All rights reserved. Design by AgriMetSoft