This tool allows you to view the geographic distribution and variability of rainfall amounts, access statistical summaries of rainfall in graphs and charts, and download the data for your own analysis. Rainfall statistics are provided for the geographic scales of the watershed, basin, WBID (Run 50), and 2km x 2km pixel.
To see rainfall mapped for a particular year, or to see a map of average rainfall, make a selection from the drop-down menu. To view statistical summaries, select a geographic area from the drop-down menu or by clicking on the map; then click the "View Details" button on the popup.
Select a Watershed or Basin
Download Rainfall Estimate Data
Download the GIS data being presented on the mapping tool for your own analysis.
In addition, you can download estimated monthly rainfall data for your own analysis by clicking on the buttons below. The link(s) will provide you with the raw data being provided by the Water Management Districts.