Begin with what you want to do
Longer daylight can offer more time outdoors, while a quieter season may change the atmosphere of a town or trail. In mountains, snow and trail conditions matter more than a date on the calendar.
Coasts have their own rhythms: wind, water conditions and visitor services can vary. Consider your tolerance for heat, rain, cold and crowds as well as the activities you hope to enjoy.
Check the details
Roads, ferries, lifts and visitor facilities may operate on seasonal schedules. Consult local official sources and the relevant transport operators close to the trip, and keep an alternative in mind.
No season guarantees a particular view or weather. Build a plan that works in more than one set of conditions and adjust it to the people traveling with you.