July weather forecast
San Francisco, CA

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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 July

July holds the title as San Francisco's warmest month of the year. However, average temperatures remain quite mild, maxing out at 72.1°F (22.3°C). Despite the prevailing summer-like conditions, San Francisco's July is characterized by cool, windy evenings. The city becomes a favorite spot for tourists seeking a respite from the scorching summer temperatures elsewhere. As August approaches, expect minimal changes in the weather conditions, maintaining the climatic consistency over the summer months.

Temperature

The transition into July reveals an average high-temperature of a still pleasant 72.1°F (22.3°C), mirroring a close resemblance to June. The temperature in San Francisco dips to an average of 55°F (12.8°C) during July nights.

Humidity

In San Francisco, the average relative humidity in July is 73%.

Rainfall

The months with the least rainfall in San Francisco, California, are July through September Rain falls for 2.3 days and accumulates 0.08" (2mm) of rain.

Ocean temperature

In San Francisco, the average seawater temperature in July is 55.4°F (13°C).
Note: Swimming in 55.4°F (13°C) can be lethal. Merely spending a few minutes in 55.4°F (13°C) waters feels harsh, and venturing below 50°F (10°C) might disrupt breathing control and bring about cold shock, contingent on individual resilience.

Daylight

The average length of the day in July is 14h and 28min.
On the first day of the month, sunrise is at 5:51 am and sunset at 8:35 pm. On the last day of July, in San Francisco, California, sunrise is at 6:13 am and sunset at 8:18 pm PDT.

Sunshine

With an average of 11.8h of sunshine, July has the most sunshine of the year.

UV index

The months with the highest UV index are April, June through September, with an average maximum UV index of 5. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for average individuals.
Note: The daily high UV index of 5 during July translates into the following recommendations:
Guard yourself - Avoiding sunburn is suggested. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
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Frequently asked questions

What are July temperatures in San Francisco?

San Francisco in July has an average high-temperature of 72.1°F (22.3°C) and an average low-temperature of 55°F (12.8°C).

What is the average humidity in July in San Francisco?

In July, the average relative humidity is 73%.

What is the driest month in San Francisco?

The months with the least rainfall in San Francisco are July through September Rain falls for 2.3 days and accumulates 0.08" (2mm) of rain.

How much does it rain in San Francisco in July?

In San Francisco, during July, the rain falls for 2.3 days and regularly aggregates up to 0.08" (2mm) of precipitation.

How cold is the water in July in San Francisco?

In July, the average ocean temperature is 55.4°F (13°C). Swimming in 55.4°F (13°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 July in San Francisco?

In San Francisco, the average day length in July is 14h and 28min.

When are sunrise and sunset in July in San Francisco?

In July, on the first day of the month, sunrise is at 5:51 am and sunset at 8:35 pm. On the last day of the month, sunrise is at 6:13 am and sunset at 8:18 pm PDT.

What month has the most sunshine in San Francisco?

July has the most sunshine of the year, with an average of 11.8h of sunshine.

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

In July, the average sunshine duration in San Francisco, California, is 11.8h.

What is the month with the highest UV index in San Francisco?

April, June through September, with an average maximum UV index of 5, are months with the highest UV index in San Francisco, California.

How high is the UV index in July in San Francisco?

In San Francisco, the average daily maximum UV index in July is 5. A UV Index reading of 3 to 5 represents a medium hazard to health from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in July
San Francisco, CA

Average temperature in July - San Francisco, CA
  • Average high temperature in July: 72.1°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 July: 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 July
San Francisco, CA

Average pressure in July - San Francisco, CA
  • Average pressure in July: 29.93"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 July
San Francisco, CA

Average wind speed in July - San Francisco, CA
  • Average wind speed in July: 6.5mph

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 July
San Francisco, CA

Average humidity in July - San Francisco, CA
  • Average humidity in July: 73%

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 July
San Francisco, CA

Average rainfall in July - San Francisco, CA
  • Average rainfall in July: 0.08"

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 July
San Francisco, CA

Average rainfall days in July - San Francisco, CA
  • Average rainfall days in July: 2.3 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 July
San Francisco, CA

Average sea temperature in July - San Francisco, CA
  • Average sea temperature in July: 55.3°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 July /
Average sunshine in July
San Francisco, CA

Average daylight in July / Average sunshine in July - San Francisco, CA
  • Average daylight in July: 14h and 3min

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 July: 11h and 5min

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 July
San Francisco, CA

Average sunshine days in July - San Francisco, CA
  • Average sunshine days in July: 24.9 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 July
San Francisco, CA

Average UV index in July - San Francisco, CA
  • Average UV index in July: 5

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 July
San Francisco, CA

Average cloud cover in July - San Francisco, CA
  • Average cloud cover in July: 14

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 July
San Francisco, CA

Average visibility in July - San Francisco, CA
  • Average visibility in July: 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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San Francisco, California, USA

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