The summers in Lakeside are brief and hot, with arid weather and clear skies, while the winters are long, chilly, and partially cloudy. With only very few excursions below 34°F or above 99°F, the average annual temperature is between 40°F and 90°F. The warm season lasts for about 2.8 months, reaching its peak in August with an average high of 89°F. With an average low temperature of 41°F and high temperature of 69°F, December is the coldest month of the colder season, which lasts for about 4.2 months.