Cold can be mitigated a lot by enhanced R-value insulation in a single application. Northern states have higher levels of insulation. https://www.energystar.g

Cold can be mitigated a lot by enhanced R-value insulation in a single application. Northern states have higher levels of insulation. https://www.energystar.gov/campaign/seal_insulate/identify_problems_you_want_fix/diy_checks_inspections/insulation_r_values https://www.energystar.gov/campaign/seal_insulate/identify_p... I don't really see a hot/cold stratification in this chart- https://www.statista.com/chart/12098/the-us-states-with-the-highest-energy-costs/ https://www.statista.com/chart/12098/the-us-states-with-the-... And even then, the difference in costs seems quite small. Alaska is $332 and Georgia is $310.