Summer 2023 weather trends for San Diego

Prepare for summer in San Diego with these seasonal temperature and precipitation outlooks.

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Long, warm summer days are on the horizon.

Photo via Monica Garske + SDtoday

We know the question on your mind — when will it get hot? Thanks to the National Oceanic and Atmospheric Administration’s (NOAA) Climate Prediction Center , we know what temperatures and precipitation trends to expect in our city for July, August, and September. While exact weather conditions typically can’t be predicted more than a week in advance, here’s a seasonal outlook to help you prepare for the summer.

Reminder: The first day of summer is Wednesday, June 21.

The summer 2023 temps will be warmer than normal in San Diego County.

Map via National Weather Service Climate Prediction Center

🌡️ Temperature

Think hot. San Diego County has a 33-50% chance of temperatures leaning above normal — on par with national trends .

🌨️ Precipitation

Although 2023 has been quite rainy locally , NOAA predicts SD will experience ordinary rainfall amounts for summer — so, not much.

☀️ Drought

NOAA predicts drought conditions will be kept at bay. January-May 2023 made for the ninth wettest year to date in San Diego County over the past 129 years — with nearly 8 inches of rainfall above normal.

Here’s to a nice, beachy summer in SD.

Photo via Monica Garske + SDtoday

Joyous July

Typically, July in SD is warm, with the average high at 75.4°. Grab your shades: July and August are the sunniest months — averaging 11.9 hours of sunshine daily — and also bring the highest UV index of 6. Pro tips : wear sunscreen and sun-protective clothing.

Awesome August

August is just beachy . It’s the warmest month of the year in San Diego — averaging a high of 77.4° — and the month with the warmest ocean water, nearly 68°. The average length of the day (sunrise to sunset) is 13 hours and 19 minutes, plenty of time for family fun .

Sizzlin’ September

Summer runs through Friday, Sept. 22. This month’s temps are still hot, averaging a high of 76.6° — and it feels a lot like August. The sun shines for an average of 10.3 hours daily, and average humidity hovers around 68%.

Looking further ahead: Weather experts say El Niño has arrived earlier than expected, so it’ll likely grow stronger through the 2023-2024 fall and winter.

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Monica is based in San Diego, California. She was previously a senior digital media producer and podcast host at NBC 7 San Diego + The Scene, and has been in the news biz since 2005. She loves hiking, the beach, and family days with her husband and two kids.
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