San Diego Temperatures: Averages by Month





The numbers here tell you how hot and cold the weather usually is in San Diego, California during each month of the year.

The average high and low temperatures are listed below monthly and annually for San Diego, in both degrees Fahrenheit and Celsius.

Maximums and minimums are only part of the temperature picture. To fill in the rest, there's information on how many days a month get above or below a given temperature.

To find out how often it rises over 60, 70 or 80 °F each month in San Diego, scroll down farther. There are also counts of nights with warm temperatures and days with cold weather.

All the numbers are averages, based on climate data gathered from 1981 to 2010.

Average San Diego temperatures
High °F Low °F   High °C Low °C
65 49 January 18 9
65 51 February 18 10
66 53 March 19 12
68 56 April 20 13
69 59 May 20 15
71 62 June 22 17
75 65 July 24 19
76 67 August 25 19
76 65 September 24 18
73 61 October 23 16
69 54 November 21 12
65 48 December 18 9
70 58 Year 21 14

Days of Hot Weather in San Diego

Despite its southern location, San Diego rarely gets hot. Temperatures over 100 °F are not normal there. Indeed, the city averages only one day a year when the thermometer reaches 90 degrees.

Yet warm weather is a year round occurrence in San Diego. A day of 80 degrees can happen in any month but December.

San Diego's nights are equally mild with an average of just ten nights a year when the thermometer doesn’t drop below 70 degrees.

Days per month in San Diego of at least 60, 70 or 80 °F
  60 °F
16 °C
70 °F
21 °C
80 °F
27 °C
January 25 7 1
February 23 5 1
March 28 5 1
April 29 7 1
May 31 10 1
June 30 17 1
July 31 27 4
August 31 30 6
September 30 27 6
October 31 21 4
November 30 11 2
December 26 5 0
Year 344 171 25
Average number of days monthly in San Diego that stay above 50, 60 or 70 °F
  50 °F
10 °C
60 °F
16 °C
70 °F
21 °C
January 13 0 0
February 17 0 0
March 25 0 0
April 29 3 0
May 31 13 0
June 30 23 0
July 31 31 3
August 31 31 4
September 30 28 3
October 31 18 0
November 23 2 0
December 11 0 0
Year 301 150 10

How Often San Diego Has Cold Temperatures

San Diego normally does not have cold weather. Every day in a typical year warms to at least 50 degrees.

The city averages just two nights a year when the thermometer dips as low as 40 °F. But it never gets low enough to freeze.

Reference

National Climatic Data Center. NOAA's 1981-2010 Climate Normals.

San Diego Weather
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