OT: There was a "Nature" two part series about horses [1] and they talked about Yakutian horses [2], native to that region.

Yakutia gets impressively cold in winter, but it is no slouch in summer, either. It normally gets up to 38℃ (100℉). Those horses take both the summer heat and the winter cold outdoors, unsheltered. That's a 108℃ (194℉) range they handle.

[1] https://www.pbs.org/wnet/nature/equus-story-of-the-horse-abo...

[2] https://en.wikipedia.org/wiki/Yakutian_horse