In New England, "Indian Summer," also known as "Second Summer," refers to a period of unseasonably warm, dry, and calm weather occurring in late autumn. Typically, this phenomenon happens after the first frost but before the onset of winter, usually between late September and mid-November. It's characterized by clear skies, warm days, cool nights, and often a hazy atmosphere.
Historically, the term "Indian Summer" has various origins, including Native American practices and European settlers' observations of the weather. Some theories suggest that Native Americans used this warm period to gather additional food for the winter, while others note that the name could stem from the haze resembling smoke from distant campfires.
This period is not guaranteed to occur every year and may vary in timing across different parts of New England. For instance, places like Farmington, Maine, might experience it as early as late September, while areas like Block Island, Rhode Island, may not see it until late November.