I would take weather out of the equation - the “cold” factor is not meaningfully different! Precipitation differs a bit, but not to a “choose your life path because of this” extent. Compare the Climate and Weather in Waterloo and Waterville - Weather Spark
It sounds like you’d rather go to Colby.
I do agree, though, that 3:2 programs are cumbersome and poorly-paced compared to 4-year engineering programs, and poorly-aligned with the social arc of a 4-year LAC experience. So I wouldn’t weight the availability of that very heavily either.