In December, the weather in Nikolaev is typically cold. Average daily high temperature in December is about 2 degrees above zero. On average, Nikolaev has 12 rainy, 12 cloudy, 3 snowy, 3 sunny, and 1 partly cloudy day in December. The rains are usually light. December as well as February, March, April, and May is considered the most uncomfortable time to visit Nikolaev.