Weather in San Diego in October 2025
Average weather
Average temperature in San Diego in October
The temperature in October is +23°C on average, with a range between a maximum of +28°C during the day and a minimum of +9°C at night.
The average maximum temperature goes up 26% by the end of the month, compared with the beginning of the month, from +21°C to +26°C.
Is San Diego warm or cold in October?
San Diego is typically warm in October.
Maximum temperatures go down compared to the previous month from +24°C to +23°C. The minimum temperature also goes down from +19°C to +17°C.
It’s generally warm, but pack a long-sleeve shirt for evenings.
October is one of the warmest months in San Diego, here is the comparison with other months:
Water temperature in San Diego in October
Water in San Diego in October is Fresh. It varies from +17°C to +20°C, with an average of +18°C. This is almost similar to the air temperature, which averages +23°C.
In October, water temperatures are average relative to the rest of the year:
Can you swim in San Diego in October?
Climate in San Diego in October
| September | October | November | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +24°C | +23°C | +21°C | ||||
| Min. temperature | ||||||
| +13°C | +9°C | +5°C | ||||
| Max. temperature | ||||||
| +38°C | +36°C | +35°C | ||||
| Rainfall | ||||||
| 10 mm | 20 mm | 34 mm | ||||
| Wind | ||||||
| 2 m/s | 2 m/s | 2 m/s | ||||
| Avg. water temperature | ||||||
| +19°C | +18°C | +17°C | ||||
| Humidity | ||||||
| 75% | 71% | 67% | ||||
| Air pressure | ||||||
| 1011 HPa | 1013 HPa | 1016 HPa | ||||
| Sunny days | ||||||
| 6 | 8 | 9 | ||||
| Cloudy days | ||||||
| 20 | 17 | 14 | ||||
| Rainy days | ||||||
| 4 | 6 | 7 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
October weather is still as good as in September. It’s getting colder in October. From +24°C in the day, the average maximum temperature lowers to +23°C. Prepare for more rain. Average rainfall goes from 10 mm to 20 mm. It feels drier, as humidity decreases from 75% to 71%. The average wind speed doesn’t change much during October, staying around 2 m/s. The good news is there are likely to be more sunny days in October, from 6 to 8.
November 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 October, going from 3 m/s to 2 m/s over the course of the month.
Rain
How was the weather last October in San Diego?
Climate Change over Years
The climate in San Diego in October 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 October a good time to visit San Diego?
Can you sunbathe in San Diego in October?
Can you swim in San Diego in October?
Is San Diego rainy in October?
Is it sunny in San Diego in October?
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.