Hottest (avg)
#1 / 12
San Diego in August
August weather, climate averages, and packing tips.
Avg High
Avg Low
Rain
Daylight 13h
What to expect
As summer continues, August brings, where the weather is warming up. Daytime highs average 25°C / 78°F, dropping to 18°C / 65°F at night.
The atmosphere is generally sunny and dry, perfect for uninterrupted outdoor plans. The sun is very strong at this time of year, making sun protection essential during the day.
Statistically, this is the hottest month of the year.
August in context
How it compares to the rest of the year in San Diego.
Wettest (avg)
#3 / 12
Daylight Hours
#4 / 12
Windiest (avg)
#7 / 12
Highest UV
#4 / 12
Most Humid
#1 / 12
Temperature
- Daytime high
-
- Nighttime low
-
- Feels like (avg)
-
Sunshine
- Daylight
- 13.3 hours
- UV index (max)
- 8
- Typical sun hours
- 05:12 – 18:31
Rain & Snow
- Total
-
- Rainy days
- 1
- Cloud cover
- 25%
- Snowfall
-
Humidity & Wind
- Humidity (avg)
- 78%
- Wind (avg)
-
- Wind (max gusts)
-
Frequently asked questions
Is August a good time to visit San Diego?
Typical August days in San Diego reach highs of 25°C (77°F) with nights around 18°C (64°F). It usually feels warm by day and mild after dark. It is one of the drier months, which suits outdoor exploring and sightseeing.
What are temperatures like in August?
In August, you can usually expect highs of 25°C (77°F) and lows near 18°C (64°F). That means warm days and mild nights, so pack layers you can add or remove.
How much does it rain in August?
Rainfall in August averages 3 mm (0.12 in) across roughly 1 days. Overall it is a mostly dry time of year, so showers are usually brief rather than all-day downpours.
How many hours of daylight are there in August?
You can expect about 13 hours of daylight in August. Sunrise is typically around 05:12 and sunset near 18:31. You get long days with comfortable amounts of daylight.
How strong is the sun in August?
UV levels frequently reach very high levels (around 8), so strong sun protection is essential, especially around midday.
Is it windy in August?
In August, average wind speeds are around 9 km/h (6 mph), with gusts on the windiest days reaching about 37 km/h (23 mph). On the ground, it is a gentle to moderate breeze is common, but stronger winds are not frequent.