Using the
codeminders site:
Bucharest, Romania is indeed one of the closest matches and is the closest match with a Dfa (arguably Cfa) climate. There are two places in Iran that are slightly closer temperature matches, but have semi-desert or continental Mediterranean climates. According to the website, the closest match of all in terms of temperature is
Chupungnyeong, South Korea, but the climate is Dwa (or Cwa).