San Diego, CA weather in July
San Diego is mild and dry in July: highs average 75°F and nights drop to about 66°F. Rain falls on about 1 day. A great month for outdoor plans.
- Normal high
- 75°F
- Normal low
- 66°F
- Wet days
- 1
- 0.08 in total
- Muggy days
- 3
- dew point 65°F+
How July changes from start to finish
| July 1 | July 31 | |
|---|---|---|
| Normal high | 74°F | 76°F |
| Normal low | 65°F | 67°F |
| Chance of a wet day | 2% | 2% |
| Sunrise / sunset | 5:44 am / 8:00 pm | 6:02 am / 7:48 pm |
| Daylight | 14.3 h | 13.8 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Pacific Time).
A typical July day
- 6 am67°Fdew point 61°F
- 9 am70°Fdew point 61°F
- Noon73°Fdew point 61°F
- 3 pm73°Fdew point 61°F
- 6 pm70°Fdew point 61°F
- 9 pm68°Fdew point 61°F
NOAA hourly normals (local standard time) from San Diego Lindbergh Fld (2 mi away); average wind 7 mph.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F11 of 31
- Beach dayshigh 80-95°F, under 0.05 in of rain, afternoon wind under 15 mph4 of 31
- Hot dayshigh 90°F or more0 of 31
- Muggy daysdaily mean dew point 65°F or more3 of 31
- Wet daysat least 0.01 in of rain or melted snow1 of 31
- Notable rainat least 0.10 in0 of 31
- Freezing nightslow 32°F or below0 of 31
Average days per July, counted from daily records for each year 1991-2020.
Rain in July
Normal precipitation is 0.08 in; a dry July brings about 0.0 in and a wet one about 0.03 in (25th and 75th percentiles). Days with half an inch or more are rare.
How July varies from year to year
- Warmest July, 1991-20202006: average high 81°F
- Coolest July2010: average high 69°F
- Wettest July2015: 1.7 in
- Driest July1997: no measurable precipitation
- Highest reading99°F (July 22, 2006)
- Lowest reading59°F (July 7, 2010)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
July compared with June and August
| June | July | August | |
|---|---|---|---|
| Normal high | 72°F | 75°F | 77°F |
| Normal low | 63°F | 66°F | 68°F |
| Wet days | 1 | 1 | 0 |
| Comfortable days | 24 | 11 | 6 |
| Daylight | 14.3 h | 14.1 h | 13.3 h |
Highs change by +3°F from June and +2°F into August.
Nearby alternatives in July
- Warmer: El Cajon, CA13 mi · high 86°F · 1 wet day
- Cooler: Oceanside, CA36 mi · high 70°F · 1 wet day
How San Diego ranks in July
- Normal high355th warmest of 378 cities; 51st of 60 in California
- Wet days47th driest of 378
- Comfortable days42nd most of 340
What to pack for San Diego in July
- Sunglasses and sunscreen – about 14.1 hours of daylight and highs near 75°F
Heating and cooling
July has 1 heating degree days and 177 cooling degree days (base 65°F), 9% of the year's total heating and cooling demand.
Questions
How hot is San Diego in July?
The normal high is 75°F and the normal low is 66°F. From 1991 to 2020 the hottest July reading was 99°F (July 22, 2006).
Does it rain a lot in San Diego in July?
About 1 days in July have at least 0.01 in of precipitation, and the normal total is 0.08 in. The wettest July in 1991-2020 was in 2015 (1.7 in); the driest was in 1997, with no measurable precipitation.
Is July a good time to visit San Diego?
July ranks 7th of 12 months on our comfort score for San Diego (72 out of 100). It has about 11 comfortable days. The best months are May and June.
Where the numbers come from
- Temperature, rain, frost dates and humidity and wind by hour: San Diego Lindbergh Fld (USW00023188), 2.0 mi NW of the city center, 15 ft . NOAA normals and daily records, 1991-2020.
- Snowfall and snow depth: Chula Vista (USC00041758), 6.7 mi SE of the city center, 56 ft . NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: San Diego International Airport (722900-23188), 2.0 mi NW of the city center, 15 ft . Hourly observations, 1991-2020.
- Not available for this location: cloud cover (no station close enough or similar enough in elevation).