April in Tbilisi is the cloudiest month of the year. In April, the weather in Tbilisi is typically warm. Average daily high temperature in April is about 14 degrees above zero. On average, Tbilisi has 17 rainy, 6 sunny, 5 partly cloudy, and 2 cloudy days in April. The rains are usually heavy. April as well as January, February, March, and May is considered the most uncomfortable time to visit Tbilisi.