Weather in San Diego in July 2025
Average weather
Average temperature in San Diego in July
The temperature in July is +24°C on average, with a range between a maximum of +27°C during the day and a minimum of +15°C at night.
The average maximum temperature goes up 25% by the end of the month, compared with the beginning of the month, from +23°C to +26°C.
Is San Diego warm or cold in July?
San Diego is typically warm in July.
Maximum temperatures go up compared to the previous month from +21°C to +23°C. The minimum temperature also goes up from +17°C to +19°C.
It’s generally warm, but pack a long-sleeve shirt for evenings.
Take a look at how July is compared to other months in San Diego:
Water temperature in San Diego in July
Water in San Diego in July is Fresh. It varies from +18°C to +21°C, with an average of +19°C. This is almost similar to the air temperature, which averages +23°C.
The water temperature in July is one of the warmest of the entire year:
Can you swim in San Diego in July?
Climate in San Diego in July
| June | July | August | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +21°C | +23°C | +24°C | ||||
| Min. temperature | ||||||
| +12°C | +15°C | +16°C | ||||
| Max. temperature | ||||||
| +34°C | +35°C | +31°C | ||||
| Rainfall | ||||||
| 3 mm | 2 mm | 4 mm | ||||
| Wind | ||||||
| 3 m/s | 3 m/s | 3 m/s | ||||
| Avg. water temperature | ||||||
| +18°C | +19°C | +20°C | ||||
| Humidity | ||||||
| 75% | 76% | 76% | ||||
| Air pressure | ||||||
| 1012 HPa | 1013 HPa | 1012 HPa | ||||
| Sunny days | ||||||
| 3 | 3 | 5 | ||||
| Cloudy days | ||||||
| 24 | 26 | 24 | ||||
| Rainy days | ||||||
| 3 | 2 | 2 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
July weather is still as good as in June. It’s getting warmer as July arrives. The average maximum temperature goes up from +21°C to +23°C during the day. As July arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 3 mm to 2 mm. Humidity rises from 75% to 76%. The average wind speed doesn’t change much during July, staying around 3 m/s. The amount of sunny days stay about the same, averaging 3 sunny days during the month.
August brings much the same weather, it remains good.
Wind
The average wind speed is 3 m/s getting up to 4 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in San Diego is gradually decreasing during July, going from 3 m/s to 2 m/s over the course of the month.
How was the weather last July in San Diego?
Climate Change over Years
The climate in San Diego in July has not changed much over the last 43 years.
The average temperature was the lowest in 2001 (+19°C) and the highest in 2014 (+23°C). The driest year was 2002 with only 156 mm of rainfall, and the wettest year was 2023 with 1311 mm.
FAQ
Is July a good time to visit San Diego?
Can you sunbathe in San Diego in July?
Can you swim in San Diego in July?
Is San Diego rainy in July?
Is it sunny in San Diego in July?
Other cities in USA
Monthly weather in San Diego
Source of the data
For this page, we’ve looked at the typical weather in San Diego, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.