Contents
- Weather in October
- Frequently asked questions
- Average temperature in October
- Average pressure in October
- Average wind speed in October
- Average humidity in October
- Average rainfall in October
- Average rainfall days in October
- Average sea temperature in October
- Average daylight in October
- Average sunshine in October
- Average sunshine days in October
- Average UV index in October
- Average cloud cover in October
- Average visibility in October
Weather in October
Temperature
San Francisco observes an average high-temperature of a still agreeable 68.9°F (20.5°C) in October, barely different from 73.2°F (22.9°C) in September. The average nighttime temperature lowers to a fresh 55°F (12.8°C) throughout October.Humidity
With an average relative humidity of 67%, October is the least humid month in San Francisco.Rainfall
In October, the rain falls for 3.5 days. Throughout October, 0.35" (9mm) of precipitation is accumulated. Throughout the year, there are 58.6 rainfall days, and 6.46" (164mm) of precipitation is accumulated.Ocean temperature
In San Francisco, in October, the average water temperature is 57°F (13.9°C).Note: It is risky to swim in 57°F (13.9°C). Temperatures beneath 50°F (10°C) induce rapid cold shock and hyperventilation.
Daylight
In San Francisco, the average length of the day in October is 11h and 12min.On the first day of the month, sunrise is at 7:06 am and sunset at 6:52 pm. On the last day of October, in San Francisco, sunrise is at 7:34 am and sunset at 6:11 pm PDT.
Sunshine
In October, the average sunshine in San Francisco is 7h.UV index
The average daily maximum UV index in October is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: The daily high UV index of 4 in October translates into this advice:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for San Francisco in October?
What is the least humid month in San Francisco?
What is the average humidity in October in San Francisco?
How many days does it rain in October in San Francisco?
What is the ocean temperature in October in San Francisco?
How many hours of daylight does San Francisco have in October?
When is the sunrise / sunset in October in San Francisco?
How long on average sun shines in October in San Francisco?
What is the UV index intensity in October in San Francisco?
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).
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).
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).
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%).
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").
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).
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).
Average daylight in October /
Average sunshine in October
San Francisco, CA
- Average daylight in October: 11h and 1min
The month with the longest days is June (Average daylight: 14h and 42min).
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).
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).
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).
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).
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).
San Francisco, California, USA
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