Hair transplantation operation can be planned regardless of the seasons. Issues you should be careful about after hair transplantation, which you can have in summer or winter, are related to your social life mostly.
If you have hair transplantation in summer, you should be avoiding sunlight and swimming for 10 days.
In winter, you are advised to use hats in order to protect you from cold after hair transplantation.
The perfect time for hair transplantation is the time you can take care of yourself away from busy work schedule and stress.