January in Al Diwaniyah is the rainiest and the coldest month of the year. In January, the weather in Al Diwaniyah is typically warm. Average daily high temperature in January is about 18 degrees above zero. On average, Al Diwaniyah has 20 sunny, 6 partly cloudy, 4 rainy, and 1 cloudy day in January. The rains are usually light.