February in Karratha is the hottest month of the year. In February, the weather in Karratha is typically hot. Average daily high temperature in February is about 34 degrees above zero. On average, Karratha has 14 partly cloudy, 12 sunny, and 3 rainy days in February. The rains are usually heavy. February as well as January, March, and December is considered the most uncomfortable time to visit Karratha.