| a period of mild, dry weather, usually accompanied by a hazy atmosphere, occurring usually in late October or early November and following a period of colder weather. |

| Indian summer n.
|
A period of unusually warm weather in the fall, often following a seasonable cold spell.
Indian summer
A period of mild, sunny weather occurring in late autumn, usually following a seasonable cold spell. For example, We had two whole days of Indian summer this year, and then it turned cold again. [Late 1700s]