February in Waterloo is the windiest and the sunniest month of the year. In February, the weather in Waterloo is typically cold. Average daily high temperature in February is about 7 degrees above zero. On average, Waterloo has 11 rainy, 7 cloudy, 6 sunny, and 5 partly cloudy days in February. The rains are usually moderate. February as well as January, March, April, and October is considered the most uncomfortable time to visit Waterloo.