February in Belfast is the coldest month of the year. In February, the weather in Belfast is typically cold. Average daily high temperature in February is about 7 degrees above zero. On average, Belfast has 15 rainy, 10 cloudy, 3 sunny, and 1 partly cloudy day in February. The rains are usually moderate. February as well as January, March, April, and May is considered the most uncomfortable time to visit Belfast.