Table 2.

Implied year where CDDs and HDDs have the same value, by weighting type and base temperature. Intercept years which fall in the range of the available data are given in bold. For these, the confidence interval is on the order of ± 3 years (see SI for further information).

		Heating Degree-days
Area-weighted	Base temperature	10 °C	15 °C	15.5 °C	16 °C	17 °C	18 °C
Cooling Degree-days	18 °C	2182	2242	2247	2254	2265	2279
	18.3 °C	2182	2241	2246	2253	2264	2277
	22 °C	2251	2308	2312	2320	2330	2344
	23 °C	2275	2332	2337	2344	2354	2368
	24 °C	2293	2348	2353	2360	2370	2384
	25 °C	2316	2372	2377	2384	2394	2407

		Heating Degree-days
Population-weighted	Base temperature	10°C	15°C	15.5°C	16°C	17°C	18°C
Cooling Degree-days	18°C	1937	1970	1974	1977	1984	1990
	18.3°C	1941	1974	1977	1980	1987	1993
	22°C	1982	2012	2015	2018	2024	2030
	23°C	1994	2023	2026	2029	2035	2041
	24°C	2007	2035	2037	2040	2046	2051
	25°C	2019	2045	2048	2050	2056	2061