San Diego Weather in August
August is one of the perfect months to visit San Diego, with daytime temperatures of 26°C (79°F) and lows of 19°C (66°F) at night. Rainfall is minimal, averaging just 0.6 mm (0.02 in) for the month.
Rainfall in San Diego in August
You can expect rain on roughly a single day based on historical data, averaging 0.6 mm (0.02 in) for the month. Any rain that does arrive is likely to be light drizzle rather than a proper shower.
Temperature in San Diego in August
August tends to be one of the perfect months in San Diego, with 26°C (79°F) in the afternoon and 19°C (66°F) overnight. This kind of day-to-night contrast is typical for this time of year. At 19°C (66°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.
Sunshine in San Diego in August
The days are predominantly sunny, with an estimated total of around 295 hours of sunshine. These sun-filled days are perfect for playing sports, visiting parks, or going for a bike ride.If your ideal day consists of dry skies and pleasant temperatures, January, February, March, April, May, June, July, August, September, October and November typically offer the best circumstances for San Diego.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our San Diego's climate page.
San Diego Temperature in August
Min Temperature
19°C (66°F)
Max Temperature
26°C (79°F)
Chance of Rain
4%
Precipitation
0.6 mm (0.02 in)
Rainy days
a single day
Humidity
74%
Sunshine
295 hours
Percentage Sunshine
71%
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in San Diego typically stay consistent throughout August, with daily highs averaging around 26°C (79°F). Nights are pleasant, with lows around 20°C (68°F).
Average temperatures in August
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in August
Historical weather for San Diego in August
Browse day-by-day weather records for San Diego spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
San Diego historical weather extremes in August
Our historical data for San Diego spans 1976 to 2025, revealing these weather extremes.
- The hottest August day on record in San Diego reached 33°C (91°F) (August 28, 2009).
- San Diego experienced its chilliest August day on August 28, 2010, reaching only 19°C (66°F).
- Nighttime temperatures dropped to 16°C (61°F) on August 14, 1999, marking the coldest August night on record.
Best Places in the United States of America in August
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in August →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in San Diego in August
Warm but pleasant conditions in San Diego in August. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.What To Do in San Diego in August
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our San Diego's climate page.
Temperature Rainfall Sunshine Humidity
See the full San Diego climate overview or explore weather in the United States of America.
