San Diego Weather in October

The pleasantly warm temperatures keep on going into October at San Diego, California. The weather also remains fairly dry and sunny.

This page gives detailed information on the typical October temperature, precipitation, sun, humidity, wind and storms for San Diego. The numbers here are historical averages based on climate data gathered at the San Diego International Airport, located on San Diego Bay near the city center.

Temperature Weather iconTemperature

75 °F October average high 24 °C
62 °F October average low 16 °C
23 days 70 °F max. or more (21 °C)
12 days 60 °F min. or less (16 °C)

Every October day usually warms to over 60 degrees Fahrenheit (16 degrees Celsius) in San Diego. The city averages 6 days this month when the thermometer reaches into the 80s °F (over 26 °C). Temperatures above 90 °F (32 °C) occur on average once each October.

While October can get as cold as 50 °F (10 °C), it's a rare event.

Rainy Weather iconRain

0.5 in total precipitation 13 mm
2 days of rain

Most years, San Diego gets less than 0.5 inches (14 mm) of rain in October. About once every four years, the city receives no rain at all this month.

Sunny Weather iconSun

68 % sunshine
14 days clear skies

The sun's rays reach the ground in San Diego during 68 percent of daylight hours on average in October, for a total of 239 hours in the month. Typically on 14 days this month the sky is mainly clear, with at most 30 percent cloud cover.

Sunlight in October at San Diego lasts for 11 hours and 20 minutes a day on average. The longest day of the month is the 1st with 11 hours and 50 minutes of daylight. By the end of the month, the days have shortened to 10:53 from sunrise to sunset. These durations can vary by a minute or two from year to year.

Humid Weather iconHumidity

69 % October average humidity

The relative humidity in San Diego during October usually peaks at 76 percent just after midnight then drops to 58 percent by early afternoon.

Local Time1 am4 am7 am10 am1 pm4 pm7 pm10 pm
Humidity % 76 76 73 61 58 63 72 75

Windy Weather iconWind

6.5 mph October wind speed average 10.5 kph

October is a little less windy than most other months in San Diego.

Stormy Weather iconStorms

0 days rainfall of 0.5 inches (13 mm) or more
0 days with thunderstorms in October

Every few years San Diego has a day in October when it gets as much as one-half to one inch (13 to 25 mm) of rain.

October is one of the most likely months for a thunderstorm in San Diego. Even so, most Octobers have no thunder and lightning.


The weather data here are long-term averages provided by the US National Centers for Environmental Information (NCEI). Temperature and precipitation are 1991-2020 normals while humidity and thunderstorms are 1961-1990 normals.

San Diego Weather
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