July weather forecast and climate
San Bruno, CA

Weather in July

July in San Bruno, California, is an agreeable summer month, with average temperature fluctuating between 54.7°F (12.6°C) and 68.5°F (20.3°C).

Temperature

In San Bruno, California, the average high-temperature is relatively the same as in June - a pleasant 68.5°F (20.3°C). In San Bruno, California, the average low-temperature is 54.7°F (12.6°C).

Humidity

The average relative humidity in July is 77%.

Rainfall

July and August are months with the least rain when the rain falls for 2.2 days and typically aggregates up to 0.04" (1mm) of rain.

Daylight

In July, the average length of the day in San Bruno is 14.5h.

Sunshine

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

UV index

June through September, with an average maximum UV index of 5, are months with the highest UV index in San Bruno. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to the Sun's UV rays for average individuals.
Note: The average daily UV index of 5 in July transform into the following instructions:
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. 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 July in San Bruno?

In July, in San Bruno, the average high-temperature is 68.5°F (20.3°C), and the average low-temperature is 54.7°F (12.6°C).

What is the average humidity in July in San Bruno?

In San Bruno, California, the average relative humidity in July is 77%.

How much does it rain in San Bruno in July?

In San Bruno, California, in July, it is raining for 2.2 days, with typically 0.04" (1mm) of accumulated precipitation.

What is the driest month in San Bruno?

Months with the least rainfall in San Bruno, California, are July and August Rain falls for 2.2 days and accumulates 0.04" (1mm) of rain.

How many hours of daylight does San Bruno have in July?

In July, the average length of the day in San Bruno, California, is 14.5h.

What month has the most sunshine in San Bruno?

The month with the most sunshine in San Bruno is July, with an average of 11.8h of sunshine.

How long on average sun shines in July in San Bruno?

The average sunshine in July in San Bruno, California, is 11.8h.

When is the highest UV index in San Bruno?

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

What is the UV index intensity in July in San Bruno?

In July, the average daily maximum UV index in San Bruno is 5. A UV Index reading of 3 to 5 represents a moderate vulnerability from the exposure to the Sun's UV radiation.

Average temperature in July
San Bruno, CA

Average temperature in July - San Bruno, CA
  • Average high temperature in July: 68.5°F

The warmest month (with the highest average high temperature) is September (69.8°F).
The month with the lowest average high temperature is December (55.8°F).

  • Average low temperature in July: 54.7°F

The month with the highest average low temperature is September (56.5°F).
The coldest month (with the lowest average low temperature) is December (47.7°F).

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Average pressure in July
San Bruno, CA

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

The month with the highest atmospheric pressure is January (30.13").
The month with the lowest atmospheric pressure is September (29.92").

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Average wind speed in July
San Bruno, CA

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

The windiest month (with the highest average wind speed) is April (8.5mph).
The calmest months (with the lowest average wind speed) are August and September (6.3mph).

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Average humidity in July
San Bruno, CA

Average humidity in July - San Bruno, CA
  • Average humidity in July: 77%

The month with the highest relative humidity is August (79%).
Months with the lowest relative humidity are October and November (71%).

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Average rainfall in July
San Bruno, CA

Average rainfall in July - San Bruno, CA
  • Average rainfall in July: 0.04"

The wettest month (with the highest rainfall) is February (2.72").
The driest months (with the least rainfall) are July and August (0.04").

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Average rainfall days in July
San Bruno, CA

Average rainfall days in July - San Bruno, CA
  • Average rainfall days in July: 2.2 days

The month with the highest number of rainy days is March (13.3 days).
Months with the least rainy days are July and August (2.2 days).

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Average daylight in July /
Average sunshine in July
San Bruno, CA

Average daylight in July / Average sunshine in July - San Bruno, CA
  • Average daylight in July: 14.5h

The month with the longest days is June (Average daylight: 14.7h).
The month with the shortest days is December (Average daylight: 9.6h).

  • Average sunshine in July: 11.8h

The month with the most sunshine is July (Average sunshine: 11.8h).
The month with the least sunshine is December (Average sunshine: 5.8h).

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Average sunshine days in July
San Bruno, CA

Average sunshine days in July - San Bruno, CA
  • Average sunshine days in July: 27.3 days

The month with the most sunshine days is July (27.3 days).
The month with the least sunshine days is March (16.3 days).

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Average UV index in July
San Bruno, CA

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

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

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Average cloud cover in July
San Bruno, CA

Average cloud cover in July - San Bruno, CA
  • Average cloud cover in July: 17

The month with the most cloud cover is March (Cloud cover 37).
The month with the least cloud cover is September (Cloud cover 16).

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Average visibility in July
San Bruno, CA

Average visibility in July - San Bruno, CA
  • Average visibility in July: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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