January in Whangarei is the sunniest month of the year. In January, the weather in Whangarei is typically warm. Average daily high temperature in January is about 21 degrees above zero. On average, Whangarei has 13 sunny, 12 partly cloudy, 5 rainy, and 1 cloudy day in January. The rains are usually light. January as well as February and March is considered the most comfortable time to visit Whangarei.