We were on a Baltic Cruise two years ago in June and the weather was unusually warm. London was in the 80's. It was in the 90's in St. Petersburg and most ports. It was so hot. Everyone was discussing how many pairs of shorts they brought. Most everyone brought one pair of shorts and wore them over and over again. I packed a lot for warm weather and lucked out because I would have froze if it was there normal temps. I am not sure what I was thinking. I would just watch the weather and see what its been like.