Heating degree days and cooling degree days for thousands of locations worldwide.
Download free data in a simple spreadsheet format.

Degree Days.net is aimed at the energy-saving professionals that are already experienced in using degree days for energy-related calculations. Provided you fit this description, you will probably find most of the options above to be fairly self explanatory. However, we suggest you read the tips below as they do cover some important points.

Degree days for beginners

Degree days are unfortunately rather easy to use badly (in a way that leads to erroneous and misleading figures), and rather difficult to use well. It can also be hard to turn degree-day-based analysis into actionable tasks that reduce consumption. There are better ways for beginners to get started saving energy (like, for example, obtaining and using a Kill-A-Watt meter to find electrical waste, and a cheap infrared laser thermometer to find thermal leaks). For these reasons, Degree Days.net is primarily aimed at the energy-saving professionals that are already experienced in using degree days as part of a broader energy-management strategy.

However, if you are a degree-days beginner that isn't afraid to delve further into a deceptively complicated form of data analysis, please read on: