February in Gaithersburg is the windiest and the cloudiest month of the year. In February, the weather in Gaithersburg is typically cold. Average daily high temperature in February is about 5 degrees above zero. On average, Gaithersburg has 11 partly cloudy, 8 rainy, 7 sunny, and 3 cloudy days in February. The rains are usually heavy. February as well as January, March, and December is considered the most uncomfortable time to visit Gaithersburg.