In December, the weather in Tbilisi is typically cold. Average daily high temperature in December is about 4 degrees above zero. On average, Tbilisi has 11 sunny, 11 partly cloudy, 6 cloudy, 2 rainy, and 1 snowy day in December. The rains are usually light. December as well as January, February, March, and April is considered the most uncomfortable time to visit Tbilisi.