"The trip is in the fall."

Translation: Aia ka huakaʻi i ke kau hāʻulelau.

[DABurnside]

Hāʻule is to fall (from an upright position), drop, tumble. We already know Lau means Leaf (if we remember Laulau, leaf-wrapped and baked packets of food). Put together, Hāʻulelau means "leaves falling" or Autumn/Fall.

[MacKinzieRob]

neat, but most trees in Hawai'i are not deciduous, and many of those that do drop leaves, do it in the summer when things get dry

[KarinLynn1]

Not sure when this word came into being, but it seems when whoever decided they needed a word for autumn (not to describe anything happening in Hawai'i) they made it literal / understandable to everyone... Like spring (I'd say there's no spring here either?) - wehewehe actually says "Season. No Hawaiian word; terms sometimes used: kupulau..." (and "kupu" is "nvi. Sprout, growth", so again, descriptive).