January in Gaziantep is the coldest month of the year. In January, the weather in Gaziantep is typically cold. Average daily high temperature in January is about 7 degrees above zero. On average, Gaziantep has 11 sunny, 10 rainy, 7 partly cloudy, and 3 cloudy days in January. The rains are usually heavy. January as well as February, March, and December is considered the most uncomfortable time to visit Gaziantep.