January in Klamath Falls is the cloudiest month of the year. In January, the weather in Klamath Falls is typically cold. Average daily high temperature in January is about 3 degrees above zero. On average, Klamath Falls has 12 partly cloudy, 9 cloudy, 4 rainy, 4 sunny, and 2 snowy days in January. The rains are usually heavy. January as well as February, March, April, and November is considered the most uncomfortable time to visit Klamath Falls.