San Diego Weather In December

The hottest December day in San Diego for the past 65 years was 31 degrees Celsius, on December 29, 1963, while the normal high temperature is 19. The lowest documented temperature in December for San Diego for the past 65 years was 1 registered on December 15, 1987, while the mean low daily temperature during the month is 9.

National Weather Service historical San Diego December Weather data indicates that on December 31, 1915, the recorded high did not exceed 9 degrees Celsius, the lowest high measured in San Diego in the past 65 years. Weather Service data also shows that on December 26, 1977, the lowest recorded temperature for the day did not drop below 18 degrees, the highest low measured temperature in San Diego in the last 65 years.

National Weather Service data shows that the high temperature in San Diego on December First averages 19 degrees Celsius and the high on the final day of December averages 18 degrees. The low recorded temperature in San Diego on December First averages 10 degrees Celsius and the low temperature on the final day of December averages 9 degrees.

San Diego usually receives an average of 3.33 centimeters of rain during the month. December San Diego Weather records indicate that on December 22, 1945 San Diego received 6.60 centimeters of precipitation, the highest amount of rain recorded in a single day in December.