Weather in San Diego in August
August in San Diego is warm outdoor weather. Days are long enough to be useful. Shade starts to matter at midday.
In United States, this is how San Diego actually wears August, not how a country centroid would. August is the peak of the warm side of the year in San Diego. If you wanted the gentlest heat, this is not that month.
- Average temp
- 22°C
20–25°C
- Rainfall
- 0 mm
Not much rain
- Sunshine
- —
- Wind
- 11 km/h
What to expect
Daytime
Warm days in San Diego in August. A hat starts to earn its keep at midday. Evenings are the comfortable part of the clock.
You can walk at more hours than in the fierce months. Still build in a pause when the sun is high. Nights are easy.
Rain
Rain is not the story in San Diego in August. Pack for sun. A shower would be news, not a plan.
Do not build the trip around weather windows. Build it around shade if it is hot, and around getting outside if it is not.
Evening
Evenings stay warm.
What to pack
Clothes for the monthly average — nothing extreme
Where to stay in San Diego
Dates are a starting point for August.
Travel guides for San Diego
What to read before you book.
Average weather in San Diego
TemperatureRainfall
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FAQs about San Diego
Climate averages for San Diego, 1991–2020.
The best time to visit San Diego is between May and October, the most comfortable stretch of the year on these averages.
August is the hottest month, with an average around 22°C.
February is the wettest month, with about 56 mm of rain.
No. These are 1991–2020 climate normals from Meteostat, not a live forecast. Actual weather in any given week can differ.
