This statistic represents the number of heating degree days worldwide in 2015, broken down by major city. In that year, there were around heating degree days in Beijing, China. According to the source, degree days are relative measurements of outdoor air temperature. Heating degree days are defined as the number of days that average temperatures fall below a chosen threshold, in this case ** degrees centigrade or ** degrees Fahrenheit.
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PBL Netherlands Environmental Assessment Agency, & Joint Research Centre. (December 6, 2016). Number of heating degree days (HDD-15) worldwide in 2015, by select city [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 31, 2026, from /statistics/716253/number-of-heating-degree-days-worldwide-by-select-city/
PBL Netherlands Environmental Assessment Agency, und Joint Research Centre. "Number of heating degree days (HDD-15) worldwide in 2015, by select city." Chart. December 6, 2016. ÌÇÐÄÆƽâ°æ. Accessed July 31, 2026. /statistics/716253/number-of-heating-degree-days-worldwide-by-select-city/
PBL Netherlands Environmental Assessment Agency, Joint Research Centre. (2016). Number of heating degree days (HDD-15) worldwide in 2015, by select city. ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 31, 2026. /statistics/716253/number-of-heating-degree-days-worldwide-by-select-city/
PBL Netherlands Environmental Assessment Agency, and Joint Research Centre. "Number of Heating Degree Days (Hdd-15) Worldwide in 2015, by Select City." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 6 Dec 2016, /statistics/716253/number-of-heating-degree-days-worldwide-by-select-city/
PBL Netherlands Environmental Assessment Agency & Joint Research Centre, Number of heating degree days (HDD-15) worldwide in 2015, by select city ÌÇÐÄÆƽâ°æ, /statistics/716253/number-of-heating-degree-days-worldwide-by-select-city/ (last visited July 31, 2026)
Number of heating degree days (HDD-15) worldwide in 2015, by select city [Graph], PBL Netherlands Environmental Assessment Agency, & Joint Research Centre, December 6, 2016. [Online]. Available: /statistics/716253/number-of-heating-degree-days-worldwide-by-select-city/
