June weather forecast
Hillsborough, CA

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Weather in June

The first month of the summer, June, is also an enjoyable month in Hillsborough, California, with an average temperature varying between 67.6°F (19.8°C) and 54°F (12.2°C).

Temperature

In June, Hillsborough notes an average high-temperature of a still refreshing 67.6°F (19.8°C), hardly different from the preceding month. Hillsborough's June nights cool down to an average low-temperature of 54°F (12.2°C).

Humidity

The average relative humidity in June is 75%.

Rainfall

In June, the rain falls for 2.4 days. Throughout June, 0.16" (4mm) of precipitation is accumulated. Throughout the year, in Hillsborough, California, there are 81.5 rainfall days, and 12.8" (325mm) of precipitation is accumulated.

Daylight

June has the longest days of the year in Hillsborough, California, with an average of 14h and 42min of daylight.
On the first day of the month, sunrise is at 5:49 am and sunset at 8:25 pm. On the last day of June, in Hillsborough, California, sunrise is at 5:51 am and sunset at 8:34 pm PDT.

Sunshine

In Hillsborough, the average sunshine in June is 11.6h.

UV index

June through September, with an average maximum UV index of 5, are months with the highest UV index in Hillsborough. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: The daily maximum UV index of 5 in June interprets into the following advice:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.
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Frequently asked questions

What is the average June temperature in Hillsborough?

June temperatures in Hillsborough vary between a high-temperature of 67.6°F (19.8°C) and a low-temperature of 54°F (12.2°C).

What is the average humidity in June in Hillsborough?

The average relative humidity in June is 75%.

How many days does it rain in June in Hillsborough?

In Hillsborough, California, during June, the rain falls for 2.4 days and regularly aggregates up to 0.16" (4mm) of precipitation.

When are the longest days in Hillsborough?

The month with the longest days is June, with an average of 14h and 42min of daylight.

What is the average length of the day in June in Hillsborough?

In Hillsborough, California, the average day length in June is 14h and 43min.

When is the sunrise / sunset in June in Hillsborough?

In June, on the first day of the month, sunrise is at 5:49 am and sunset at 8:25 pm. On the last day of the month, in Hillsborough, sunrise is at 5:51 am and sunset at 8:34 pm PDT.

How many hours of sunshine does Hillsborough have in June?

The average sunshine duration in June in Hillsborough, California, is 11.6h.

What are the months with the highest UV index in Hillsborough?

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

How high is the UV index in June in Hillsborough?

In Hillsborough, California, the average daily maximum UV index in June is 5. A UV Index reading of 3 to 5 represents a medium health risk 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 June
Hillsborough, CA

Average temperature in June - Hillsborough, CA
  • Average high temperature in June: 67.6°F

The warmest month (with the highest average high temperature) is September (70.2°F).
The month with the lowest average high temperature is December (55.6°F).

  • Average low temperature in June: 54°F

The month with the highest average low temperature is September (56.8°F).
The coldest month (with the lowest average low temperature) is January (47.5°F).

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Average pressure in June
Hillsborough, CA

Average pressure in June - Hillsborough, CA
  • Average pressure in June: 29.93"Hg

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

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Average wind speed in June
Hillsborough, CA

Average wind speed in June - Hillsborough, CA
  • Average wind speed in June: 7.5mph

The windiest month (with the highest average wind speed) is April (8.3mph).
The calmest month (with the lowest average wind speed) is September (6.1mph).

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Average humidity in June
Hillsborough, CA

Average humidity in June - Hillsborough, CA
  • Average humidity in June: 75%

The month with the highest relative humidity is August (78%).
The month with the lowest relative humidity is October (70%).

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Average rainfall in June
Hillsborough, CA

Average rainfall in June - Hillsborough, CA
  • Average rainfall in June: 0.16"

The wettest month (with the highest rainfall) is February (2.44").
The driest month (with the least rainfall) is July (0.08").

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Average rainfall days in June
Hillsborough, CA

Average rainfall days in June - Hillsborough, CA
  • Average rainfall days in June: 2.4 days

The month with the highest number of rainy days is March (12.8 days).
The months with the least rainy days are June and July (2.4 days).

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Average daylight in June /
Average sunshine in June
Hillsborough, CA

Average daylight in June / Average sunshine in June - Hillsborough, CA
  • Average daylight in June: 14h and 4min

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 June: 11h and 4min

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 June
Hillsborough, CA

Average sunshine days in June - Hillsborough, CA
  • Average sunshine days in June: 23.7 days

The month with the most sunshine days is July (24.6 days).
The month with the least sunshine days is March (16.3 days).

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Average UV index in June
Hillsborough, CA

Average UV index in June - Hillsborough, CA
  • Average UV index in June: 5

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

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Average cloud cover in June
Hillsborough, CA

Average cloud cover in June - Hillsborough, CA
  • Average cloud cover in June: 17

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 15).

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Average visibility in June
Hillsborough, CA

Average visibility in June - Hillsborough, CA
  • Average visibility in June: 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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Hillsborough, California, USA

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