Unless I'm on a beach, I'd say cold: you can always add layers...
Even in the Arctic I prefer winter (end of summer is nice too when temp is around 0-10C but then it can be mosquito fest on non windy days). I'd take (a dry)-50C over +50C any day.
As far as I know, nobody has lost toes because of hot weather.
But you can have a heat stroke...and die too.