The manual for the Thundersky LFP260ah batteries shows they only loose about 10-12% range at -25C (-13F) compared to 25C (77F).
They loose about 20% range at -45C (-49F). But that is COLD.
(even for Canada)
The small reduction in range doesn't seem like much to worry about.
I am sizing the batts ~25% big so they will still meet the range requirement as they age (or when the temps drop).
LFP seem less affected by cold than lead.
--sorry, that's what happens when U use the back button to edit... :|