January in Los Alamos is the snowiest and the coldest month of the year. In January, the weather in Los Alamos is typically cold. Average daily high temperature in January is about 2 degrees above zero. On average, Los Alamos has 16 sunny, 8 partly cloudy, 4 snowy, and 3 cloudy days in January. The snowfalls are usually moderate. January as well as February, March, July, and August is considered the most uncomfortable time to visit Los Alamos.