An Indian summer is a period of unseasonably warm, dry weather that sometimes occurs in autumn in temperate regions of the northern hemisphere. Several sources describe a true Indian summer as not occurring until after the first frost, or more specifically the first "killing frost".[1][2][3]
- ^ "Second summer- Glossary of Meteorology, American Meteorological Society". October 25, 2020.
- ^ "What Is "Indian Summer" Or "Second Summer"?". November 1, 2021.
- ^ Deedler, William (Fall 1996). "Just What Is Indian Summer And Did Indians Really Have Anything To Do With It?". Detroit/Pontiac, MI: National Weather Service Weather Forecast Office. Archived from the original on October 9, 2014. Retrieved September 24, 2014.