My current 2.5 month trip has me going to numerous places with temperatures ranging from 30 degrees F to 85 degrees F. Packing was a nightmare. My hotel in London offered to store some of the stuff I accumulated as well as the cold climate clothes while I head out to the warmer areas. (I'll be returning to that hotel before going home.)
It's in a box and I had planned to ship it home. However, the cost was ridiculous. I found out it is actually less expensive to buy a cheap suitcase and bring the stuff home with me by checking that bag. (I usually carry on and get one free checked bag.)
It will be a pain to get two bags to the airport but I'll be saving about 50 GBP.