View daily and seasonal heating degree days for Madison, Wisconsin, from 1869 to the present day, using combined data from the stations at the Madison city weather bureau office (January 1869–December 1946) and Dane County Regional Airport (January 1947–present). This chart shows the daily and total heating degree days compared with the normal heating degree days. The vertical lines and left axis represent the daily heating degree days; the horizontal lines and right axis represent the seasonal total and normal heating degree days.
Click and drag anywhere on the chart to zoom in on specific data points.