What is the meaning of Indian summer in the UK?

An Indian summer is a calm, warm spell in autumn, often in October or November, characterized by clear skies and light winds. Though not a formal meteorological term, its name originated in 18th-century North America and describes a brief, unexpected return of warmth as the year cools.

What is the meaning of Indian summer in the UK?
An Indian summer is a calm, warm spell in autumn, often in October or November, characterized by clear skies and light winds. Though not a formal meteorological term, its name originated in 18th-century North America and describes a brief, unexpected return of warmth as the year cools.