In February, the weather in Terrance B. Lettsome International Airport is typically warm. Average daily high temperature in February is about 26 degrees above zero. On average, Terrance B. Lettsome International Airport has 25 sunny, 2 rainy, and 2 partly cloudy days in February. The rains are usually light. February as well as January, March, and April is considered the most comfortable time to visit Terrance B. Lettsome International Airport.