San Diego weather
Ten-year climate averages, month by month
San Diego in august
Current month averages, based on ten years of records. Read the full guide →
San Diego sits at 32°42′N 117°09′W in United States, in North America. Its climate profile is shaped by these coordinates — and the ten years of records below reveal exactly how each season feels on the ground.
Below, you'll find monthly averages for temperature, rainfall and sunshine, drawn from the Open-Meteo Archive. Every month links to a full guide with what to pack, where to stay, and when to arrive.
The year in weather
San Diego weather by month
Pick a month for the full climate guide — temperature, rainfall, sunshine, packing tips and hotel deals for San Diego.
Places that feel like San Diego in august
San Diego weather — FAQ
Q01When is the best time to visit San Diego?
When is the best time to visit San Diego?
The best months to visit San Diego are April, June, July, August. Ten-year daily records show these months hold the most stable mix of temperature, rainfall and sunshine.
Q02What is the hottest month in San Diego?
What is the hottest month in San Diego?
August runs the highest averages in San Diego, with typical daytime highs of 26°C (78°F). Plan around midday and consider accommodation with reliable cooling.
Q03What is the coldest month in San Diego?
What is the coldest month in San Diego?
January brings the lowest averages, with daytime highs near 18°C (64°F). Layer up and expect shorter daylight hours if you plan sightseeing.
Q04Which month has the most rain in San Diego?
Which month has the most rain in San Diego?
January typically records the highest monthly rainfall — around 69mm on average. Plan indoor alternatives and pack proper rain gear if visiting this month.
Q05What is the climate like in San Diego?
What is the climate like in San Diego?
San Diego, United States has mild summers, warm winters. You can read the detailed month-by-month breakdown on this page.