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Fall 2023 weather trends in San Diego

Prepare for fall weather in America’s Finest City with these seasonal temperature and precipitation outlooks.

SD Fall Hiking

We love a fall hike in SD.

Photo via Monica Garske + SDtoday

We know the question on your mind, San Diegans — when’s it going to cool down? 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 September, October, and November.

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 what fall will bring.

Reminder: The first day of fall is on Sept. 23, 2023.

SD NOAA Fall 2023 Map San Diego

Autumn is near, weather you like it or not.

Map via NOAA

🌡️ Temperature
Think warm. This fall, San Diego has a 40-50% chance of temperatures leaning higher than normal.

🌨️ Precipitation
Our city is expected to experience typical seasonal precipitation this autumn.

☀️ Drought
NOAA is forecasting drought conditions will be kept at bay this fall. January-May 2023 made for the wettest year to date in San Diego County over the past 129 years, and also — how ‘bout that Hilary?

Dancin’ in September
San Diegans know temperatures are still warm, averaging a high of 76.6° with a relative humidity of 68%. Ocean temps are nice, too, averaging 66.7° — the second warmest month for the sea in SD. The UV index remains high, so use sun protection and limit your exposure to those rays.

Oh hay, October
San Diego averages a high temperature of 73.2° in October, and rain falls for ~3.4 days. The sea temps take a dip, averaging 65.1° — but beach days (maybe sans swimming) are still on the horizon along the coast with the most.

Nice November
Flannel and flip-flops, anyone? The average daytime high is a pleasant 68.5° and a cool 57.4° at night — perfect hiking and sleeping weather. November is the least humid month with 59% relative humidity, and it rains for an average of 5.1 days.

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