October in Jember is the warmest month of the year. In October, the weather in Jember is typically warm. Average daily high temperature in October is about 27 degrees above zero. On average, Jember has 26 rainy, 3 cloudy, and 2 sunny days in October. The rains are usually heavy. October as well as January, February, March, and April is considered the most uncomfortable time to visit Jember.