August in Liverpool is the cloudiest and the warmest month of the year. In August, the weather in Liverpool is typically warm. Average daily high temperature in August is about 18 degrees above zero. On average, Liverpool has 18 rainy, 8 partly cloudy, 3 cloudy, and 2 sunny days in August. The rains are usually heavy. August as well as January, February, March, and April is considered the most uncomfortable time to visit Liverpool.