January in Jakarta is the rainiest, the windiest, and the cloudiest month of the year. In January, the weather in Jakarta is typically hot. Average daily high temperature in January is about 28 degrees above zero. On average, Jakarta has 29 rainy, 1 cloudy, and 1 partly cloudy day in January. The rains are usually heavy. January as well as February, March, April, and May is considered the most uncomfortable time to visit Jakarta.