June weather forecast and climate
San Bruno, CA

Weather in June

The first month of the summer, June, is still a comfortable month in San Bruno, California, with average temperature varying between 67.3°F (19.6°C) and 53.8°F (12.1°C).

Temperature

In San Bruno, the average high-temperature is almost the same as in May - a still enjoyable 67.3°F (19.6°C). The average low-temperature, in San Bruno, California, is 53.8°F (12.1°C).

Humidity

In San Bruno, the average relative humidity is 75%.

Rainfall

In San Bruno, during 2.5 rainfall days, 0.12" (3mm) of precipitation is typically accumulated. In San Bruno, during the entire year, the rain falls for 81.8 days and collects up to 13.46" (342mm) of precipitation.

Daylight

With an average of 14.7h of daylight, June has the longest days of the year in San Bruno.

Sunshine

In June, the average sunshine in San Bruno, California, is 11.5h.

UV index

June through September, with an average maximum UV index of 5, are months with the highest UV index. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to the UV radiation for the ordinary person.
Note: The average daily UV index of 5 in June transform into the following instructions:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for 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 June in San Bruno?

In San Bruno, in June, the average high-temperature is 67.3°F (19.6°C), and the average low-temperature is 53.8°F (12.1°C).

What is the average humidity in June in San Bruno?

In June, the average relative humidity in San Bruno, California, is 75%.

How many days does it rain in June in San Bruno?

In San Bruno, in June, it is raining for 2.5 days, with typically 0.12" (3mm) of accumulated precipitation.

When are the longest days in San Bruno?

June has the longest days of the year in San Bruno, with an average of 14.7h of daylight.

What is the average length of the day in June in San Bruno?

In June, the average length of the day in San Bruno is 14.7h.

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

In June, the average sunshine in San Bruno is 11.5h.

What are the months with 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.

What is the UV index reading in June in San Bruno?

The average daily maximum UV index in June in San Bruno is 5. A UV Index estimate of 3 to 5 represents a moderate health threat from unprotected exposure to the UV radiation.

Average temperature in June
San Bruno, CA

Average temperature in June - San Bruno, CA
  • Average high temperature in June: 67.3°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 June: 53.8°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 June
San Bruno, CA

Average pressure in June - San Bruno, CA
  • Average pressure in June: 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 June
San Bruno, CA

Average wind speed in June - San Bruno, CA
  • Average wind speed in June: 7.7mph

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 June
San Bruno, CA

Average humidity in June - San Bruno, CA
  • Average humidity in June: 75%

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 June
San Bruno, CA

Average rainfall in June - San Bruno, CA
  • Average rainfall in June: 0.12"

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 June
San Bruno, CA

Average rainfall days in June - San Bruno, CA
  • Average rainfall days in June: 2.5 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 June /
Average sunshine in June
San Bruno, CA

Average daylight in June / Average sunshine in June - San Bruno, CA
  • Average daylight in June: 14.7h

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 June: 11.5h

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 June
San Bruno, CA

Average sunshine days in June - San Bruno, CA
  • Average sunshine days in June: 25.5 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 June
San Bruno, CA

Average UV index in June - San Bruno, CA
  • Average UV index in June: 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 June
San Bruno, CA

Average cloud cover in June - San Bruno, CA
  • Average cloud cover in June: 19

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 June
San Bruno, CA

Average visibility in June - San Bruno, CA
  • Average visibility in June: 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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