October weather forecast
San Diego, CA

Coronado Island in San Diego, California, USA,
Coronado Island in San Diego, California, USA,

Weather in October

October, the same as September, in San Diego, California, is another pleasant autumn month, with an average temperature varying between 61.9°F (16.6°C) and 73.2°F (22.9°C).

Temperature

In San Diego, the average high-temperature in October is relatively the same as in September - a pleasant 73.2°F (22.9°C). In San Diego, California, the average low-temperature is 61.9°F (16.6°C).

Humidity

In October, the average relative humidity is 65%.

Rainfall

In San Diego, during 3.4 rainfall days, 0.31" (8mm) of precipitation is typically accumulated. In San Diego, during the entire year, the rain falls for 61.8 days and collects up to 8.7" (221mm) of precipitation.

Ocean temperature

In October, the average ocean temperature in San Diego is 65.1°F (18.4°C).
Note: Swimming in 65.1°F (18.4°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

Daylight

In San Diego, the average length of the day in October is 11h and 21min.
On the first day of October, sunrise is at 6:42 am and sunset at 6:33 pm. On the last day of the month, sunrise is at 7:05 am and sunset at 5:58 pm PDT.

Sunshine

In San Diego, the average sunshine in October is 8.8h.

UV index

In San Diego, the average daily maximum UV index in October is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 5 in October interpret into the following advice:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the average humidity in October in San Diego?

The average relative humidity in October is 65%.

How much does it rain in San Diego in October?

In San Diego, California, during October, the rain falls for 3.4 days and regularly aggregates up to 0.31" (8mm) of precipitation.

What is the ocean temperature in October in San Diego?

In San Diego, in October, the average water temperature is 65.1°F (18.4°C). For swimming, a surface water temperature of 65.1°F (18.4°C) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 69.8°F (21°C).

What is the average length of the day in October in San Diego?

The average day length in October is 11h and 21min.

When is the sunrise / sunset in October in San Diego?

On the first day of October, sunrise is at 6:42 am and sunset at 6:33 pm. On the last day of the month, sunrise is at 7:05 am and sunset at 5:58 pm PDT.

How long on average sun shines in October in San Diego?

In San Diego, the average sunshine duration in October is 8.8h.

What is the UV index intensity in October in San Diego?

The average daily maximum UV index in October is 5. A UV Index estimate of 3 to 5 represents a medium health risk from unprotected exposure to UV radiation.

Average temperature in October
San Diego, CA

Average temperature in October - San Diego, CA
  • Average high temperature in October: 73.2°F

The warmest month (with the highest average high temperature) is August (77.4°F).
The month with the lowest average high temperature is February (63.1°F).

  • Average low temperature in October: 61.9°F

The month with the highest average low temperature is August (65.7°F).
The coldest month (with the lowest average low temperature) is February (51.8°F).

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Average pressure in October
San Diego, CA

Average pressure in October - San Diego, CA
  • Average pressure in October: 29.93"Hg

The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are June and September (29.88"Hg).

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Average wind speed in October
San Diego, CA

Average wind speed in October - San Diego, CA
  • Average wind speed in October: 5.2mph

The windiest months (with the highest average wind speed) are April and May (6.3mph).
The calmest month (with the lowest average wind speed) is October (5.2mph).

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Average humidity in October
San Diego, CA

Average humidity in October - San Diego, CA
  • Average humidity in October: 65%

The month with the highest relative humidity is June (73%).
The month with the lowest relative humidity is November (59%).

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Average rainfall in October
San Diego, CA

Average rainfall in October - San Diego, CA
  • Average rainfall in October: 0.31"

The wettest month (with the highest rainfall) is December (1.65").
The driest month (with the least rainfall) is June (0.12").

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Average rainfall days in October
San Diego, CA

Average rainfall days in October - San Diego, CA
  • Average rainfall days in October: 3.4 days

The month with the highest number of rainy days is March (7.6 days).
The month with the least rainy days is June (2.7 days).

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Average sea temperature in October
San Diego, CA

Average sea temperature in October - San Diego, CA
  • Average sea temperature in October: 65.1°F

The best month for swimming (with the highest average sea temperature) is August (67.9°F).
The coldest month (with the lowest average sea temperature) is February (58.7°F).

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Average daylight in October /
Average sunshine in October
San Diego, CA

Average daylight in October / Average sunshine in October - San Diego, CA
  • Average daylight in October: 11h and 21min

The month with the longest days is June (Average daylight: 14h and 16min).
The month with the shortest days is December (Average daylight: 10h and 2min).

  • Average sunshine in October: 8h and 48min

The months with the most sunshine are July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).

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Average sunshine days in October
San Diego, CA

Average sunshine days in October - San Diego, CA
  • Average sunshine days in October: 23.8 days

The month with the most sunshine days is January (24.3 days).
The month with the least sunshine days is July (20.3 days).

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Average UV index in October
San Diego, CA

Average UV index in October - San Diego, CA
  • Average UV index in October: 5

The months with the highest UV index are July, August and September (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 4).

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Average cloud cover in October
San Diego, CA

Average cloud cover in October - San Diego, CA
  • Average cloud cover in October: 14

The month with the most cloud cover is December (Cloud cover 24).
The month with the least cloud cover is August (Cloud cover 9).

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Average visibility in October
San Diego, CA

Average visibility in October - San Diego, CA
  • Average visibility in October: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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