On my ebike I might drop from 100%->70% on a summer's ride to work and 100%->60% on a cold winter day. (It doesn't get much colder than -20C though) So there i

On my ebike I might drop from 100%->70% on a summer's ride to work and 100%->60% on a cold winter day. (It doesn't get much colder than -20C though) So there is an effect, but it isn't terrible. Ideally your battery already has extra capacity in the first place- everybody knows that some buffer capacity helps extend the life of the battery. I find snow & ice are not a big deal for range either, even with studs & aggressive tires, because you reduce your speed & assist for safety.