January in North Las Vegas is the cloudiest month of the year. In January, the weather in North Las Vegas is typically warm. Average daily high temperature in January is about 13 degrees above zero. On average, North Las Vegas has 15 sunny, 9 partly cloudy, 4 rainy, and 3 cloudy days in January. The rains are usually light. January as well as July and August is considered the most uncomfortable time to visit North Las Vegas.