St. martin's summer
From Glossary of Meteorology
St. Martin's summer
In English folklore, a period of fine, calm weather, similar to an Indian summer, occurring in November.
St. Martin's Day (Martinmas) is 11 November.
Compare St. Luke's summer, All-hallown summer, Old Wives' summer.
Compare St. Luke's summer, All-hallown summer, Old Wives' summer.