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.
|High °F||Low °F||High °C||Low °C|
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.
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.
National Climatic Data Center. NOAA's 1981-2010 Climate Normals.