January in Toyama is the rainiest and the coldest month of the year. In January, the weather in Toyama is typically cold. Average daily high temperature in January is about 3 degrees above zero. On average, Toyama has 23 rainy, 6 sunny, and 2 partly cloudy days in January. The rains are usually heavy. January as well as February, March, and December is considered the most uncomfortable time to visit Toyama.