It goes without saying that out of the four seasons, summer is the most ideal one for major home remodeling. The sky and the ground will (most likely) be dry, and with the exception of the Fourth of July, there are no major holidays. Some homeowners will take vacations, further minimizing the impact of remodeling.
Before you answer this question, look at your own kitchen.
Does it look like a place that you want to spend time in? The time you need to create wholesome, memorable meals for the people whom you love?