January weather forecast in Oamaru

January in Oamaru is the windiest and the warmest month of the year. In January, the weather in Oamaru is typically warm. Average daily high temperature in January is about 17 degrees above zero. On average, Oamaru has 13 partly cloudy, 8 rainy, 8 sunny, and 2 cloudy days in January. The rains are usually moderate.