August in Pine Bluff is the rainiest month of the year. In August, the weather in Pine Bluff is typically hot. Average daily high temperature in August is about 31 degrees above zero. On average, Pine Bluff has 14 sunny, 10 rainy, and 7 partly cloudy days in August. The rains are usually heavy. August as well as January, February, and December is considered the most uncomfortable time to visit Pine Bluff.