October weather forecast
San Diego, CA

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

Weather in October

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

Temperature

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

Humidity

The average relative humidity in October in San Diego is 65%.

Rainfall

In San Diego, during October, the rain falls for 3.4 days and regularly aggregates up to 0.31" (8mm) of precipitation. Throughout the year, there are 61.8 rainfall days, and 8.7" (221mm) of precipitation is accumulated.

Ocean temperature

In San Diego, the average seawater temperature in October is 65.1°F (18.4°C).
Note: For most, swimming in 65.1°F (18.4°C) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 69.8°F (21°C) to 59°F (15°C).

Daylight

The average length of the day in October in San Diego is 11h and 21min.
On the first day of October in San Diego, 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 5:59 pm PDT.

Sunshine

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

UV index

In October, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 5 in October transform into the following instructions:
Take precautions - Protection against skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in October in San Diego?

In October, in San Diego, the average high-temperature is 73.2°F (22.9°C), and the average low-temperature is 61.9°F (16.6°C).

What is the average humidity in October in San Diego?

The average relative humidity in October in San Diego, California, is 65%.

How many days does it rain in October in San Diego?

In October, in San Diego, California, the rain falls for 3.4 days. Throughout October, 0.31" (8mm) of precipitation is accumulated.

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 most, swimming in 65.1°F (18.4°C) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 69.8°F (21°C) to 59°F (15°C).

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

In October, the average day length is 11h and 21min.

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

On the first day of October in San Diego, California, 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 5:59 pm PDT.

How many hours of sunshine does San Diego have in October?

The average sunshine duration in October is 8.8h.

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

In San Diego, California, the average daily maximum UV index in October is 5. A UV Index value of 3 to 5 symbolizes a moderate health threat from exposure to the Sun's 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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