Temperatures
Average monthly temperatures range from 57.3 °F (14.1 °C) in January to 72.5 °F (22.5 °C) in August, although late summer and early autumn are typically the hottest times of the year with temperatures occasionally reaching 90 °F (32 °C) or higher. Snow and ice are rare in the wintertime, typically occurring only inland from the coast when present. "May gray and June gloom", a local saying, refers to the way in which San Diego sometimes has trouble shaking off the fog that comes in during those months. Temperatures soar to very high readings only on rare occasions, chiefly when easterly winds bring hot, dry air from the inland deserts (these winds are called "Santa Ana winds").
The record high temperature at the National Weather Service office in San Diego of 111 °F (44 °C) was on September 26, 1963. The record low temperature was 25 °F (−4 °C) on January 7, 1913. The record high temperature was tied only once and happened on September 27, 2010, 47 years and two days after the set record. Several temperatures near San Diego broke their all-time records that day.
Read more about this topic: Climate Of San Diego