In February, the weather in Saint-Omer is typically cold. Average daily high temperature in February is about 6 degrees above zero. On average, Saint-Omer has 13 rainy, 7 cloudy, 5 sunny, and 4 partly cloudy days in February. The rains are usually moderate. February as well as January, March, October, and November is considered the most uncomfortable time to visit Saint-Omer.