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 13 rainy, 7 partly cloudy, 6 sunny, and 5 cloudy days in January. The rains are usually light. January as well as February, March, November, and December is considered the most uncomfortable time to visit Klamath Falls.