December in Fremont is the coldest month of the year. In December, the weather in Fremont is typically warm. Average daily high temperature in December is about 11 degrees above zero. On average, Fremont has 13 partly cloudy, 12 sunny, 5 rainy, and 1 cloudy day in December. The rains are usually light. December as well as January and February is considered the most uncomfortable time to visit Fremont.