San Diego weather
11-year climate averages (2015–2025), month by month
San Diego in october
Current month averages, based on 11 complete years of records (2015–2025). 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 11 complete years of records below (2015–2025) 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 october
San Diego weather — FAQ
Q01What is the ideal season to travel to San Diego?
What is the ideal season to travel to San Diego?
The best months to visit San Diego are April, June, July, August. September-October see the marine layer finally burn off by 10am and water temperatures peak at 21C, prime for La Jolla Cove snorkeling with leopard sharks.
Q02When does San Diego reach its peak summer heat?
When does San Diego reach its peak summer heat?
August runs the highest averages in San Diego, with typical daytime highs of 26°C (78°F). August Santa Ana winds push inland temperatures past 35C; locals abandon the county fair and cluster at Pacific Beach or drive to Coronado's ferry-cooled sand.
Q03When is winter at its deepest in San Diego?
When is winter at its deepest in San Diego?
January brings the lowest averages, with daytime highs near 18°C (64°F). January nights drop to 8C and rain turns Mission Valley freeways treacherous; locals switch from fish tacos to green corn tamales at Las Cuatro Milpas.
Q04What is the wettest time of year in San Diego?
What is the wettest time of year in San Diego?
January typically records the highest monthly rainfall — around 69mm on average. February atmospheric rivers dump inches overnight and the San Diego River jumps its banks near Fashion Valley, flooding trolley tracks for days.
Q05What kind of climate does San Diego have?
What kind of climate does San Diego have?
San Diego, United States has mild summers, warm winters. The city runs on microclimates: it can be 18C and foggy in Ocean Beach while it's 32C and dry in El Cajon, 20 miles apart. Locals never say 'San Diego' for their neighborhood — it's Hillcrest, North Park, Barrio Logan, or PB. The Convoy district in Kearny Mesa has better Sichuan and Korean food than anywhere in LA, and no tourist ever finds it. 'Freeway' takes 'the' — 'the 5,' 'the 805.' You can read the detailed month-by-month breakdown on this page.