August in Batumi is the rainiest and the warmest month of the year. In August, the weather in Batumi is typically warm. Average daily high temperature in August is about 25 degrees above zero. On average, Batumi has 20 rainy, 10 sunny, and 1 partly cloudy day in August. The rains are usually heavy. August as well as January, February, March, and April is considered the most uncomfortable time to visit Batumi.