January in Umm al-Quwain is the sunniest and the coldest month of the year. In January, the weather in Umm al-Quwain is typically warm. Average daily high temperature in January is about 23 degrees above zero. On average, Umm al-Quwain has 31 sunny days in January. January as well as February and December is considered the most comfortable time to visit Umm al-Quwain.