August in Los Mochis is the rainiest month of the year. In August, the weather in Los Mochis is typically hot. Average daily high temperature in August is about 33 degrees above zero. On average, Los Mochis has 20 rainy, 8 sunny, 2 partly cloudy, and 1 cloudy day in August. The rains are usually heavy. August as well as July is considered the most uncomfortable time to visit Los Mochis.