If you're thinking that you'd like to sell your car and possibly buy something newer, better, more economical, faster or even just something more reliable, then the summer months may be the perfect time to do this.
The summer months tend to bring out the best in people. The sunshine tends to lead to people being happier and therefore they're more inclined to spend time outside. This is in stark contrast to the winter months when people are less willing to leave to the house due to the poor weather. This combination of good mood and time spent outside means that people are more likely to go shopping for either a new or used car. The fact that the summer months come after the end of the financial year when budgets and pay rises have been agreed is also a useful.