San Diego
California, USA
Long-term weather forecast
Long-term weather forecast
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October weather forecast and Climate
San Diego, CA

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The view of Coronado Island in San Diego, California, from across a water body on a sidewalk, with a row of palm trees
The view of Coronado Island in San Diego, California, from across a water body on a sidewalk, with a row of palm trees
October lies in the autumn season of San Diego with mostly dry and sunny weather. The average temperatures are in the 63°F (17.2°C) to 71°F (21.7°C) range, which makes the conditions pleasant.
The daylight drops to 11 hours and the daily sunlight to 7.9 hours. The skies tend to be cloudy in the morning and clear by afternoon. The end of the summer brings down the average humidity to 69%. An odd spell of rain is due in the month, but the rain rarely goes beyond it. October may surprise with a thunderstorm in San Diego!
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  • The average high temperature in October: 72.8°F

The warmest month (with the highest average high temperature) is August (76.4°F).
The month with the lowest average high temperature is December (64.7°F).

  • The average low temperature in October: 60.6°F

The month with the highest average low temperature is August (66.7°F).
The coldest month (with the lowest average low temperature) is December (48.4°F).

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  • The average humidity in October: 69.4%

The month with the highest relative humidity is July (74.6%).
The month with the lowest relative humidity is January (63.1%).

  • The average rainfall in October: 0.3"

The wettest month (with the highest rainfall) is January (2.1").
The driest month (with the lowest rainfall) is July (0").

  • The average rainfall days in October: 2.8 days

The month with the highest number of rainy days is February (7.1 days).
The month with the lowest number of rainy days is August (0.4 days).

  • The 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).

  • The average daylight in October: 11h

Months with the longest days are May, June and July (Average daylight: 14h).
Months with shortest days are January, November and December (Average daylight: 10h).

  • The average sunshine in October: 7.9h

The month with most sunshine is July (Average sunshine: 9.8h).
The month with least sunshine is December (Average sunshine: 7.5h).

  • The average UV index in October: 6

Months with the highest UV index are June, July and August (UV index 10).
Months with the lowest UV index are January and December (UV index 3).

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