1920 Atlantic hurricane season
The 1920 Atlantic hurricane season featured tropical storms and hurricanes only in the month of September. (The present-day delineation of the Atlantic hurricane season is June 1 to November 30.) The first system, a hurricane, developed on September 7 while the last, a tropical depression, transitioned into an extratropical cyclone on October 27.
Source: Wikipedia — 1920 Atlantic hurricane season (CC BY-SA 4.0)