'summer-like' originates from the English word 'summer' combined with the suffix '-like', where 'summer' refers to the warmest season of the year and '-like' means 'resembling or similar to'.

'Summer' comes from the Old English word 'sumor', which has Germanic origins, and '-like' is a common English suffix used to form adjectives.

The term has consistently meant 'resembling summer' since its formation.