January in Reno is the rainiest month of the year. In January, the weather in Reno is typically cold. Average daily high temperature in January is about 3 degrees above zero. On average, Reno has 10 partly cloudy, 9 sunny, 7 rainy, and 5 cloudy days in January. The rains are usually moderate. January as well as February and December is considered the most uncomfortable time to visit Reno.