San Diego weather in July
Temperature, sea and sunshine in July: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in July
Excellent
Best time to visit: July – September
What is the weather like in San Diego in July?
In July, San Diego is warm: daytime highs average 24 °C, and nights cool down to about 17 °C. The sea averages 20.3 °C – refreshing for a swim. With around 12 hours of sunshine a day, there is plenty of sun. It hardly ever rains. All in all, July is an excellent month for a holiday in San Diego.
July compared
How the weather changes from June to August. Tap a month to open it.
More details for July
- Daylight
- 14 h 7 min05:51 – 19:58
- UV index
- 11 · extremeclear sky, noon (estimate)
- Muggy days
- 5 daysdew point 18 °C or more
- Wind
- 16 km/haverage daily peak
- Cloud cover
- 31 %on average
- Hot days
- 0 days30 °C or more
- Time zone
- UTC−7America/Los_Angeles
How the score comes together
- Temperatureweight 35 %90 %
- Seaweight 25 %47 %
- Sunshineweight 20 %100 %
- Few rainy daysweight 20 %100 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in July
- Swimwear
- Sunscreen
- Sunglasses & sun hat
San Diego in July: quick answers
Is San Diego hot in July?
Warm rather than hot: in July, daytime highs in San Diego average 24 °C and nights cool to about 17 °C.
Can you swim in San Diego in July?
Yes. In July the sea averages 20.3 °C – refreshing for a swim.
Does it rain much in San Diego in July?
It hardly ever rains.
San Diego month by month
The whole year in San DiegoAll destinations: USA
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, GeoNames (CC BY 4.0)