Yes, it's well known and established that cold climates has negative effect on batteries. Of course if you're trying to get the best result you optimize the conditions. Just look how most sports records and times are set with best conditions available.

They did this distance before in Europe, namely from Stuttgart to the French mediterranean coast and from Stuttgart again to Silverstone, in the UK. [1]

[1] https://www.adac.de/rund-ums-fahrzeug/autokatalog/marken-mod...

That's the point: to illustrate what is possible. Isolating variables is the most basic scientific principle.

Similarly, demonstrations of gasoline engines aren't usually done in high altitudes, where the oxygen levels would constrain the engines.

> no inclimate weather

Last time I was in Dubai the outside temperature was 41C. Wind “chill” took that up to 49C.

This isn't a demonstration... It's a record.

Is it a surprise for you that setting a record requires optimal environmental conditions? It shouldn't be...