June weather forecast
Hercules, CA

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Weather in June

The first month of the summer, June, is a warm month in Hercules, California, with temperature in the range of an average low of 54.3°F (12.4°C) and an average high of 74.8°F (23.8°C).

Temperature

The coming of June brings a minor shift in Hercules's weather, with average high-temperatures adjusting from May's agreeable 69.3°F (20.7°C) to a moderately hot 74.8°F (23.8°C). During June, an average low-temperature of 54.3°F (12.4°C) is observed in Hercules.

Humidity

The average relative humidity in June in Hercules is 65%.

Rainfall

In June, in Hercules, the rain falls for 2 days. Throughout June, 0.16" (4mm) of precipitation is accumulated. Throughout the year, there are 72.2 rainfall days, and 12.83" (326mm) of precipitation is accumulated.

Ocean temperature

In June, the average ocean temperature in Hercules is 52.9°F (11.6°C).
Note: With the appropriate swimsuit, one can swim in 52.9°F (11.6°C) even if temperatures dip below 50°F (10°C); otherwise, be ready for cold shock and breath issues. A fleeting swim around 55.4°F (13°C) is distressing.

Daylight

June has the longest days of the year in Hercules, with an average of 14h and 48min of daylight.
On the first day of the month, sunrise is at 5:47 am and sunset at 8:26 pm. On the last day of June, in Hercules, sunrise is at 5:50 am and sunset at 8:35 pm PDT.

Sunshine

The average sunshine in June is 11.6h.

UV index

The months with the highest UV index in Hercules are April through September, with an average maximum UV index of 5. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: In June, the UV index of 5 transforms into the following advice:
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. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
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Frequently asked questions

What are June temperatures in Hercules?

In June, the average high-temperature and low-temperature in Hercules are 74.8°F (23.8°C) and 54.3°F (12.4°C) respectively.

What is the average humidity in June in Hercules?

In June, the average relative humidity is 65%.

How many days does it rain in June in Hercules?

In Hercules, California, in June, during 2 rainfall days, 0.16" (4mm) of precipitation is typically accumulated.

What is the ocean temperature in June in Hercules?

In Hercules, the average seawater temperature in June is 52.9°F (11.6°C). Swimming in 52.9°F (11.6°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

When are the longest days in Hercules?

With an average of 14h and 48min of daylight, June has the longest days of the year in Hercules, California.

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

In Hercules, California, the average day length in June is 14h and 46min.

When is the sunrise / sunset in June in Hercules?

On the first day of June in Hercules, sunrise is at 5:47 am and sunset at 8:26 pm. On the last day of the month, sunrise is at 5:50 am and sunset at 8:35 pm PDT.

How long on average sun shines in June in Hercules?

In Hercules, the average sunshine duration in June is 11.6h.

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

The months with the highest UV index are April through September, with an average maximum UV index of 5.

How high is the UV index in June in Hercules?

The average daily maximum UV index in June in Hercules is 5. A UV Index estimate of 3 to 5 represents a moderate health threat from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in June
Hercules, CA

Average temperature in June - Hercules, CA
  • Average high temperature in June: 74.8°F

The warmest month (with the highest average high temperature) is September (77.5°F).
The month with the lowest average high temperature is December (55.4°F).

  • Average low temperature in June: 54.3°F

The month with the highest average low temperature is August (56.8°F).
The coldest months (with the lowest average low temperature) are January and December (43.9°F).

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Average pressure in June
Hercules, CA

Average pressure in June - Hercules, CA
  • Average pressure in June: 29.92"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 June
Hercules, CA

Average wind speed in June - Hercules, CA
  • Average wind speed in June: 7.2mph

The windiest month (with the highest average wind speed) is May (7.5mph).
The calmest month (with the lowest average wind speed) is November (4.8mph).

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Average humidity in June
Hercules, CA

Average humidity in June - Hercules, CA
  • Average humidity in June: 65%

The month with the highest relative humidity is March (74%).
The months with the lowest relative humidity are September and October (63%).

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Average rainfall in June
Hercules, CA

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

The wettest month (with the highest rainfall) is February (2.76").
The driest months (with the least rainfall) are July and August (0.04").

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Average rainfall days in June
Hercules, CA

Average rainfall days in June - Hercules, CA
  • Average rainfall days in June: 2 days

The month with the highest number of rainy days is March (12.6 days).
The month with the least rainy days is August (1.1 days).

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Average sea temperature in June
Hercules, CA

Average sea temperature in June - Hercules, CA
  • Average sea temperature in June: 52.9°F

The best month for swimming (with the highest average sea temperature) is September (57°F).
The coldest month (with the lowest average sea temperature) is April (52.6°F).

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

Average daylight in June / Average sunshine in June - Hercules, CA
  • Average daylight in June: 14h and 5min

The month with the longest days is June (Average daylight: 14h and 48min).
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 54min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).

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Average sunshine days in June
Hercules, CA

Average sunshine days in June - Hercules, CA
  • Average sunshine days in June: 25.8 days

The month with the most sunshine days is August (27.3 days).
The month with the least sunshine days is March (16.4 days).

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Average UV index in June
Hercules, CA

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

The months with the highest UV index are April, May, 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 June
Hercules, CA

Average cloud cover in June - Hercules, CA
  • Average cloud cover in June: 15

The month with the most cloud cover is March (Cloud cover 37).
The month with the least cloud cover is July (Cloud cover 12).

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Average visibility in June
Hercules, CA

Average visibility in June - Hercules, 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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Hercules, California, USA

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