About Dunmore Town, Harbour Island's Climate & Weather History

Dunmore Town is a city of approximately 1,500 people in Harbour Island, BS. Located in the America/Nassau time zone at 25.5°N latitude.

In 2025, Dunmore Town recorded an average annual temperature of 78°F. The hottest temperatures reached 91°F in August; the coolest were 63°F in March. Total precipitation for the year was 37 inches, with the wettest month being September.