Month-by-month travel weather
San Diego August weather
San Diego, United States · August
Sun can feel intense even when air is dry
August stays warm and dry. Sunny hours can feel hot quickly under direct sun.
Evenings near the coast can cool down, while inland areas can stay warmer.
August averages at a glance
Average low
around 19–21°C
Average high
around 25–28°C
Average precipitation
around 0–5 mm
Rainy days
about 0–1 days
What to wear in August in San Diego
Actual feel will change with wind and rain, but use the suggestions below to build a comfortable layered outfit.
- • Breathable summer clothing works well.
- • Hat and sunscreen help.
- • Thin evening layer is optional.
Travel tips for visiting San Diego in August
- • Shift longer walks to morning/evening on hotter days.
- • Dry air can feel dehydrating—plan water.
August weather in San Diego — FAQ
Q. Is it humid?
A. Usually not very humid; sun exposure and location matter more.
Q. Are nights cool?
A. Coastal areas often cool down, though warm nights are still possible.
Explore San Diego
These pages are connected so you can compare conditions and decide for yourself.