August in Whangarei is the rainiest month of the year. In August, the weather in Whangarei is typically warm. Average daily high temperature in August is about 14 degrees above zero. On average, Whangarei has 14 rainy, 8 sunny, 6 partly cloudy, and 3 cloudy days in August. The rains are usually heavy. August as well as July and September is considered the most uncomfortable time to visit Whangarei.