Background: After a very snowy winter, I am ready for a dry summer. Can we predict how much rain we will get this summer based off winter snowfall? Sometimes it seems like winter and summer weather are related, but what do the data say?

The graph is a scatter plot of winter precipitation (December, January, February) and summer precipitation (June, July, August) in inches of water for Mexico, ME from 1949 to 2008. 

Data Source: