During the summer, plants wither, stuff gets set on fire, you overheat... it's worse than winter ever was.
Two existing questions on this site answer how to prepare (How do I prepare for summer heat?) and how to survive (Summer has come and I don't know what to do), but none of those really answer my question:
Is there anything to do, during summer, except survive?
During winter you can hunt mactusk, for the very desirable walking cane. You can chop ice, to prepare for summer. You gather pengull eggs & feathers, for gunpowder. Spring comes with frogs, rains (mushrooms!). Autumn is the calm season, without much threats, the easy one.
Offcourse, in every season, the purpose is to defeat the giant - but is there more to summer? What can be done in summer that can't be (as easily) done during other seasons?