How to compute SPI on 1-month time scale and 5-month time scale ?
You can calculate n-month SPI easily. You would follow these steps:
- Sort your monthly data in an Excel file
- Calculate moving average based on: Simple Moving Average Formula or the below video.
- Calculate SPI by the moving average data as monthly data
Notice: Monthly SPI is equal to monthly SPI so you can calculate monthly SPI and get it 1-month SPI
Notice: You can use one of our tools(MDM, RDIT, or DMAP) for this calculation or you can calculate it manually in Excel. Visit this page: How to calculate standard precipitation index in excel?
Name: SUMAN SARITA
