What is shoulder season? Shoulder season is the time period of April, May, early June, September and early October. It combines the advantages of both peak-season and off-season travel.
In shoulder season, you'll enjoy decent weather, long-enough daylight, fewer crowds, and a local tourist industry that is still eager to please and entertain.
Because fall and spring bring cooler temperatures in Mediterranean Europe, "shoulder season" in much of Italy, southern France, and Spain can actually come with peak-season crowds and prices. If debating the merits of spring versus fall, consider your destination.