I came across the phrase "through heat or cold" in the Economist,
Hunting lay at the heart of that doctrine: the virile business of learning to shoot straight, to track beasts through brutal heat or cold and to master “buck fever”—a nervous excitement felt in the face of prey that must be suppressed by effort of will.
I've never seen such an expression before. I guess it means to endure the severe hot or bitter cold weather. Is "through heat or cold" an idiom in English? Are there other expressions with the same meaning?