August · United States
Best time to visit San Diego in August Weather, crowds & prices
Weather in San Diego in August
Average temperature 22°C, 13 mm of rain, about 30 days with 6+ hours of sunshine and 78% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
August score
9.6/10
Ranked #5 of 12 months
- Avg temp
- 22°C
- Rainfall
- 13 mm
- Humidity
- 78%
- Days with 6h+ sun
- 30
- Crowd Density
- Peak Tourist Rush
- Average Expenses
- $$$ · Peak Season Rates ($$$)
August in San Diego scores 9.6/10 for sightseeing and cultural travel - an above-average month (#5 of 12). Expect around 22°C, 13 mm of rain, and roughly 30 days with 6+ hours of sunshine this month.
Balboa Park, the zoo, and La Jolla's coast sit within a short drive of downtown San Diego.
August ranks 5th of 12 for San Diego — one of the best windows
At 22°C (71°F) this is comfortable city weather in August, with sightseeing easiest before lunch and after the afternoon peak.
At just 13 mm for the month, rain will not shape your plans; you get about 30 days with 6+ hours of sunshine and 13.3 hours of daylight.
On our climate-comfort scale this is one of the strongest months of the year for San Diego at 9.6/10 (5th of 12), just behind April at 9.7/10.
Pack light clothing, a hat and real sun protection.
Expect peak pricing, and this is one of the busiest months here.
Frequently asked
- What is the weather like in San Diego in August?
- In August, San Diego averages 22°C, 13 mm of rain, and about 30 days with 6+ hours of sunshine. Its climate-comfort score is 9.6/10.
- Is August a good time to visit San Diego?
- August earns a 9.6/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in San Diego in August?
- Expect about 13 mm of rain in August. Average humidity is 78% and there are about 30 days with 6+ hours of sunshine.
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