July weather forecast and climate
Hercules, CA

Weather in July

July, the same as June, is a moderately hot summer month in Hercules, California, with average temperature fluctuating between 55.4°F (13°C) and 76.6°F (24.8°C).

Temperature

In Hercules, the average high-temperature is essentially the same as in June - a still warm 76.6°F (24.8°C). The average low-temperature, is 55.4°F (13°C).

Humidity

In Hercules, the average relative humidity is 67%.

Rainfall

Months with the least rainfall are July and August Rain falls for 1.7 days and accumulates 0.04" (1mm) of rain.

Ocean temperature

In July, the average ocean temperature is 55.4°F (13°C).
Note: Swimming in 55.4°F (13°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

Daylight

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

Sunshine

July has the most sunshine of the year in Hercules, California, with an average of 11.9h of sunshine.

UV index

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 moderate health risk from the 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 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 July in Hercules?

In Hercules, California, in July, the average high-temperature is 76.6°F (24.8°C), and the average low-temperature is 55.4°F (13°C).

What is the average humidity in July in Hercules?

The average relative humidity in July in Hercules is 67%.

How much does it rain in Hercules in July?

In Hercules, California, during July, the rain falls for 1.7 days and regularly aggregates up to 0.04" (1mm) of precipitation.

What is the driest month in Hercules?

July and August are months with the least rain when the rain falls for 1.7 days and typically aggregates up to 0.04" (1mm) of rain.

How cold is the water in July in Hercules?

In Hercules, in July, the average water temperature is 55.4°F (13°C). Swimming in 55.4°F (13°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

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

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

What month has the most sunshine in Hercules?

July has the most sunshine of the year, with an average of 11.9h of sunshine.

How many hours of sunshine does Hercules have in July?

In Hercules, the average sunshine in July is 11.9h.

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

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

What is the UV index intensity in July in Hercules?

In July, the average daily maximum UV index in Hercules is 5. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from unsafe exposure to the Sun's UV rays.

Average temperature in July
Hercules, CA

Average temperature in July - Hercules, CA
  • Average high temperature in July: 76.6°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 July: 55.4°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 July
Hercules, CA

Average pressure in July - Hercules, CA
  • Average pressure in July: 29.93"

The month with the highest atmospheric pressure is January (30.13").
Months with the lowest atmospheric pressure are June, August and September (29.92").

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Average wind speed in July
Hercules, CA

Average wind speed in July - Hercules, CA
  • Average wind speed in July: 6.8mph

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 July
Hercules, CA

Average humidity in July - Hercules, CA
  • Average humidity in July: 67%

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

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Average rainfall in July
Hercules, CA

Average rainfall in July - Hercules, CA
  • Average rainfall in July: 0.04"

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 July
Hercules, CA

Average rainfall days in July - Hercules, CA
  • Average rainfall days in July: 1.7 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 July
Hercules, CA

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

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

The month with the longest days is June (Average daylight: 14.8h).
The month with the shortest days is December (Average daylight: 9.6h).

  • Average sunshine in July: 11.9h

The month with the most sunshine is July (Average sunshine: 11.9h).
The month with the least sunshine is December (Average sunshine: 5.7h).

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Average sunshine days in July
Hercules, CA

Average sunshine days in July - Hercules, CA
  • Average sunshine days in July: 26.8 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 July
Hercules, CA

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

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

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Average cloud cover in July
Hercules, CA

Average cloud cover in July - Hercules, CA
  • Average cloud cover in July: 12

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 July
Hercules, CA

Average visibility in July - Hercules, 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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