January in Geneva is the coldest month of the year. In January, the weather in Geneva is typically cold. Average daily high temperature in January is about 2 degrees above zero. On average, Geneva has 19 rainy, 6 sunny, 3 cloudy, and 3 partly cloudy days in January. The rains are usually heavy. January as well as February, March, April, and May is considered the most uncomfortable time to visit Geneva.