January in Tijuana is the rainiest and the coldest month of the year. In January, the weather in Tijuana is typically warm. Average daily high temperature in January is about 16 degrees above zero. On average, Tijuana has 13 sunny, 8 partly cloudy, 6 rainy, and 4 cloudy days in January. The rains are usually moderate. January as well as February, March, and December is considered the most uncomfortable time to visit Tijuana.