This document analyzes solar radiation trends in Madison, WI from 1997 to 2014. It finds that the annual solar resource increased 7% from 2000 to 2012, with significant monthly variability. Some months like February, March and December saw slightly less sunshine, while August, October, May and June saw much more sunshine. This suggests climate change may be increasing solar yields for parts of the year. The document provides background on the quality of the solar radiation data and services offered by Madison Solar Consulting.