The 1920 Atlantic hurricane season featured tropical storms and hurricanes only in the month of September. The first system, a hurricane, developed on September 7 while the last, a tropical depression, transitioned into an extratropical cyclone on October 27. Of note, four of the six cyclones co-existed with another tropical cyclone during the season. 5 storms, 4 hurricanes, 0 major hurricanes (Category 3+). Strongest: an unnamed storm (110 mph). Accumulated cyclone energy ≈ 30. Wiki link