January weather forecast in Invercargill

January in Invercargill is the warmest month of the year. In January, the weather in Invercargill is typically warm. Average daily high temperature in January is about 18 degrees above zero. On average, Invercargill has 16 rainy, 8 partly cloudy, 4 sunny, and 3 cloudy days in January. The rains are usually heavy.