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The short answer is yes, cold weather decreases EV range because it affects the battery chemistry by forcing EVs to use more energy to maintain battery temperature and cabin heat.
Cold weather could be minimal or as much as 20% less depending on conditions and the EV.
Cold Temperatures Affect an Electric Vehicle's Driving Range - Consumer Reports
Consumer Reports lets you know whether cold temperatures affect an electric vehicle’s driving range. The cold can reduce an unplugged EV’s range by about 20%.

Impact Of Cold Weather On EV Models' Range: Report
Some EVs fare much better than others in cold temperatures, but no car is immune from temporary winter range loss. If you experience cold temps, check this out.
