October weather forecast
San Francisco, CA

A beautiful dusk view of the Golden Gate Bridge in San Francisco, California
A beautiful dusk view of the Golden Gate Bridge in San Francisco, California

Weather in October

October, like September, is an agreeable autumn month in San Francisco, California, with an average temperature varying between 55°F (12.8°C) and 68.9°F (20.5°C).

Temperature

In October, the average high-temperature is almost the same as in September - a still pleasant 68.9°F (20.5°C). In October, the average low-temperature is 55°F (12.8°C).

Humidity

October is the least humid month in San Francisco, with an average relative humidity of 67%.

Rainfall

In San Francisco, during October, the rain falls for 3.5 days and regularly aggregates up to 0.35" (9mm) of precipitation. In San Francisco, California, during the entire year, the rain falls for 58.6 days and collects up to 6.46" (164mm) of precipitation.

Ocean temperature

In October, the average ocean temperature is 57°F (13.9°C).
Note: At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

Daylight

In San Francisco, the average length of the day in October is 11h and 12min.
On the first day of October, sunrise is at 7:05 am and sunset at 6:53 pm. On the last day of the month, sunrise is at 7:34 am and sunset at 6:12 pm PDT.

Sunshine

In San Francisco, the average sunshine in October is 7h.

UV index

The average daily maximum UV index in October is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for the ordinary person.
Note: The daily maximum UV index of 4 in October interpret into the following advice:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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 temperature in October in San Francisco?

The average high-temperature, in October, is 68.9°F (20.5°C), while the average low-temperature is 55°F (12.8°C).

What is the least humid month in San Francisco?

With an average relative humidity of 67%, October is the least humid month in San Francisco, California.

What is the average humidity in October in San Francisco?

In San Francisco, the average relative humidity in October is 67%.

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

In San Francisco, California, during October, the rain falls for 3.5 days and regularly aggregates up to 0.35" (9mm) of precipitation.

What is the ocean temperature in October in San Francisco?

In October, the average ocean temperature in San Francisco, California, is 57°F (13.9°C). Swimming in 57°F (13.9°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

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

The average day length in October in San Francisco is 11h and 12min.

What time are sunrise and sunset in October in San Francisco?

In October, on the first day of the month, sunrise is at 7:05 am and sunset at 6:53 pm. On the last day of the month, in San Francisco, California, sunrise is at 7:34 am and sunset at 6:12 pm PDT.

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

The average sunshine duration in October in San Francisco is 7h.

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

The average daily maximum UV index in October in San Francisco, California, is 4. A UV Index of 3 to 5 symbolizes a medium health risk from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in October
San Francisco, CA

Average temperature in October - San Francisco, CA
  • Average high temperature in October: 68.9°F

The warmest month (with the highest average high temperature) is September (73.2°F).
The month with the lowest average high temperature is December (55.8°F).

  • Average low temperature in October: 55°F

The month with the highest average low temperature is September (56.7°F).
The coldest months (with the lowest average low temperature) are January and December (45.9°F).

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Average pressure in October
San Francisco, CA

Average pressure in October - San Francisco, CA
  • Average pressure in October: 29.98"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).

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Average wind speed in October
San Francisco, CA

Average wind speed in October - San Francisco, CA
  • Average wind speed in October: 5.6mph

The windiest month (with the highest average wind speed) is May (7.6mph).
The calmest month (with the lowest average wind speed) is November (5.5mph).

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Average humidity in October
San Francisco, CA

Average humidity in October - San Francisco, CA
  • Average humidity in October: 67%

The month with the highest relative humidity is March (76%).
The month with the lowest relative humidity is October (67%).

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Average rainfall in October
San Francisco, CA

Average rainfall in October - San Francisco, CA
  • Average rainfall in October: 0.35"

The wettest month (with the highest rainfall) is February (1.38").
The driest months (with the least rainfall) are July, August and September (0.08").

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Average rainfall days in October
San Francisco, CA

Average rainfall days in October - San Francisco, CA
  • Average rainfall days in October: 3.5 days

The month with the highest number of rainy days is March (9.3 days).
The month with the least rainy days is June (1.9 days).

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Average sea temperature in October
San Francisco, CA

Average sea temperature in October - San Francisco, CA
  • Average sea temperature in October: 56.9°F

The best month for swimming (with the highest average sea temperature) is September (57.3°F).
The coldest months (with the lowest average sea temperature) are April and June (53°F).

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

Average daylight in October / Average sunshine in October - San Francisco, CA
  • Average daylight in October: 11h and 12min

The month with the longest days is June (Average daylight: 14h and 44min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in October: 7h and 0min

The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).

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Average sunshine days in October
San Francisco, CA

Average sunshine days in October - San Francisco, CA
  • Average sunshine days in October: 25.8 days

The month with the most sunshine days is October (25.8 days).
The month with the least sunshine days is March (20.8 days).

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Average UV index in October
San Francisco, CA

Average UV index in October - San Francisco, CA
  • Average UV index in October: 4

The months with the highest UV index are April, June, July, August and September (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 3).

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Average cloud cover in October
San Francisco, CA

Average cloud cover in October - San Francisco, CA
  • Average cloud cover in October: 18

The month with the most cloud cover is March (Cloud cover 36).
The months with the least cloud cover are July and September (Cloud cover 14).

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Average visibility in October
San Francisco, CA

Average visibility in October - San Francisco, 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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