An Indian Summer refers to a time of year when temperatures are considerably above normal.
The term Indian Summer dates as far back as the early 1800s with possible connections to early American Indian tribes, and typically is associated with a stretch of warm, quiet weather occurring in the autumn months.
Though the exact circumstances that constitute a true Indian Summer are debated, most agree on a few solid aspects that define an Indian Summer.
Many references to an Indian Summer state that a true Indian Summer can not occur until there has been a killing frost or freeze.
While this is typically and almost exclusively a weather event that occurs in the fall, some areas have reported weather conditions applicable to an Indian Summer in the winter months.