An indian summer is a spell of warm weather late in the year. Enjoy an indian summer.
It properly comes after the first frost, which is what makes it worth naming. An indian summer is also said of a late flowering in somebody's life or career.
1nounindian summerA spell of warm weather late in the year.
“The indian summer lasted into the last week of October.”
indian summer is a spell.
Practised in Weather & Seasons