About Coolbellup, Western Australia's Climate & Weather History

Coolbellup is a city of approximately 5,200 people in Western Australia, Australia. Located in the Australian Western time zone at 32.1°S latitude.

In 2025, Coolbellup recorded an average annual temperature of 66°F. The hottest temperatures reached 106°F in January; the coolest were 41°F in July. Total precipitation for the year was 36 inches, with the wettest month being June.