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The average sea surface temperature in February 2015 for San Diego was 63.6Â°F. The maximum and minimum values were 63.0Â°F and 64.0Â°F respectively.
The record high temperature at the National Weather Service office in San Diego of 111 Â°F (44 Â°C) was on September 26, 1963. The record low temperature was 25 Â°F (â4 Â°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 cities near San Diego broke their all-time records that day. Precipitation. San Diego has on average 146 sunny days and 117 partly cloudy days a year.