March weather forecast and climate
Hercules, CA

Weather in March

The first month of the spring, March, is an enjoyable month in Hercules, California, with temperature in the range of an average high of 61°F (16.1°C) and an average low of 46°F (7.8°C).

Temperature

In March, the average high-temperature is practically the same as in February - a comfortable 61°F (16.1°C). In Hercules, in March, the average low-temperature is 46°F (7.8°C).

Humidity

The most humid month in Hercules is March, with an average relative humidity of 74%.

Rainfall

In Hercules, it is raining for 12.6 days, with typically 2.09" (53mm) of accumulated precipitation. In Hercules, during the entire year, the rain falls for 72.2 days and collects up to 12.83" (326mm) of precipitation.

Ocean temperature

In March, the average ocean temperature is 53.4°F (11.9°C).
Note: At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

Daylight

The average length of the day in Hercules is 12h.

Sunshine

In Hercules, the average sunshine is 7.7h.

UV index

In March, the average daily maximum UV index is 4. 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 4 transform into the following instructions:
Take precautions - Protection against the skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in March in Hercules?

In Hercules, California, in March, the average high-temperature is 61°F (16.1°C), and the average low-temperature is 46°F (7.8°C).

What is the most humid month in Hercules?

March is the most humid month in Hercules, with an average relative humidity of 74%.

What is the average humidity in March in Hercules?

In Hercules, California, the average relative humidity in March is 74%.

How much does it rain in Hercules in March?

In Hercules, California, in March, during 12.6 rainfall days, 2.09" (53mm) of precipitation is typically accumulated.

How cold is the water in March in Hercules?

In Hercules, the average seawater temperature in March is 53.4°F (11.9°C). At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

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

In Hercules, the average length of the day in March is 12h.

How many hours of sunshine does Hercules have in March?

In March, the average sunshine in Hercules is 7.7h.

What is the UV index reading in March in Hercules?

The average daily maximum UV index in March is 4. A UV Index estimate of 3 to 5 represents a moderate vulnerability from unprotected exposure to the UV radiation.

Average temperature in March
Hercules, CA

Average temperature in March - Hercules, CA
  • Average high temperature in March: 61°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 March: 46°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 March
Hercules, CA

Average pressure in March - Hercules, CA
  • Average pressure in March: 30.07"

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 March
Hercules, CA

Average wind speed in March - Hercules, CA
  • Average wind speed in March: 6.5mph

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 March
Hercules, CA

Average humidity in March - Hercules, CA
  • Average humidity in March: 74%

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 March
Hercules, CA

Average rainfall in March - Hercules, CA
  • Average rainfall in March: 2.09"

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 March
Hercules, CA

Average rainfall days in March - Hercules, CA
  • Average rainfall days in March: 12.6 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 March
Hercules, CA

Average sea temperature in March - Hercules, CA
  • Average sea temperature in March: 53.5°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 March /
Average sunshine in March
Hercules, CA

Average daylight in March / Average sunshine in March - Hercules, CA
  • Average daylight in March: 12h

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 March: 7.7h

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 March
Hercules, CA

Average sunshine days in March - Hercules, CA
  • Average sunshine days in March: 16.4 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 March
Hercules, CA

Average UV index in March - Hercules, CA
  • Average UV index in March: 4

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 March
Hercules, CA

Average cloud cover in March - Hercules, CA
  • Average cloud cover in March: 37

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 March
Hercules, CA

Average visibility in March - Hercules, CA
  • Average visibility in March: 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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