March weather forecast
Port Costa, CA

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Weather in March

The first month of the spring, March, is a refreshing month in Port Costa, California, with temperature in the range of an average low of 45°F (7.2°C) and an average high of 61.5°F (16.4°C).

Temperature

March welcomes an average high-temperature of a comfortable 61.5°F (16.4°C), not much different from the preceding month. In March, Port Costa experiences an average nighttime temperature of 45°F (7.2°C).

Humidity

The most humid month in Port Costa is March, with an average relative humidity of 75%.

Rainfall

In Port Costa, in March, it is raining for 10.2 days, with typically 0.75" (19mm) of accumulated precipitation. Throughout the year, there are 56.9 rainfall days, and 4.88" (124mm) of precipitation is accumulated.

Daylight

In Port Costa, the average length of the day in March is 11h and 59min.
On the first day of the month, sunrise is at 6:39 am and sunset at 6:02 pm PST. On the last day of March, sunrise is at 6:53 am and sunset at 7:31 pm PDT.
Note: On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from PST to PDT. Daylight Saving Time lasts until Sunday, November 3. 2024, at 2:00 am; consequently, the time zone reverts from PDT to PST.

Sunshine

In Port Costa, California, the average sunshine in March is 7.7h.

UV index

In March, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: In March, an average UV index of 4 transforms into the following instructions:
Adopt protective measures - It is advised to guard against sun damage. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
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Frequently asked questions

What are March temperatures in Port Costa?

The average high-temperature, in March, in Port Costa, is 61.5°F (16.4°C), while the average low-temperature is 45°F (7.2°C).

What is the most humid month in Port Costa?

March is the most humid month, with an average relative humidity of 75%.

What is the average humidity in March in Port Costa?

In March, the average relative humidity in Port Costa, California, is 75%.

How much does it rain in Port Costa in March?

In Port Costa, in March, during 10.2 rainfall days, 0.75" (19mm) of precipitation is typically accumulated.

What is the average length of the day in March in Port Costa?

In Port Costa, California, the average day length in March is 11h and 59min.

When is the sunrise / sunset in March in Port Costa?

On the first day of March in Port Costa, sunrise is at 6:39 am and sunset at 6:02 pm PST. On the last day of the month, sunrise is at 6:53 am and sunset at 7:31 pm PDT.

When does Daylight Saving Time (DST) start in March in Port Costa?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Port Costa, California, and the time zone changes from PST to PDT. DST ends Sunday, November 3. 2024, at 2:00 am.

How long on average sun shines in March in Port Costa?

In Port Costa, the average sunshine duration in March is 7.7h.

What is the UV index reading in March in Port Costa?

In Port Costa, California, the average daily maximum UV index in March is 4. A UV Index estimate of 3 to 5 represents a moderate vulnerability 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 March
Port Costa, CA

Average temperature in March - Port Costa, CA
  • Average high temperature in March: 61.5°F

The warmest months (with the highest average high temperature) are July and September (80.1°F).
The month with the lowest average high temperature is December (55.4°F).

  • Average low temperature in March: 45°F

The month with the highest average low temperature is August (56.5°F).
The coldest month (with the lowest average low temperature) is January (43°F).

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Average pressure in March
Port Costa, CA

Average pressure in March - Port Costa, CA
  • Average pressure in March: 30.07"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in March
Port Costa, CA

Average wind speed in March - Port Costa, CA
  • Average wind speed in March: 6mph

The windiest month (with the highest average wind speed) is May (7.1mph).
The calmest month (with the lowest average wind speed) is November (4.6mph).

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Average humidity in March
Port Costa, CA

Average humidity in March - Port Costa, CA
  • Average humidity in March: 75%

The month with the highest relative humidity is March (75%).
The months with the lowest relative humidity are September and October (60%).

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Average rainfall in March
Port Costa, CA

Average rainfall in March - Port Costa, CA
  • Average rainfall in March: 0.75"

The wettest month (with the highest rainfall) is February (1.14").
The driest months (with the least rainfall) are July and August (0.04").

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Average rainfall days in March
Port Costa, CA

Average rainfall days in March - Port Costa, CA
  • Average rainfall days in March: 10.2 days

The month with the highest number of rainy days is March (10.2 days).
The month with the least rainy days is August (0.9 days).

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Average daylight in March /
Average sunshine in March
Port Costa, CA

Average daylight in March / Average sunshine in March - Port Costa, CA
  • Average daylight in March: 12h and 0min

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 March: 7h and 4min

The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).

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Average sunshine days in March
Port Costa, CA

Average sunshine days in March - Port Costa, CA
  • Average sunshine days in March: 18.8 days

The month with the most sunshine days is July (27.2 days).
The month with the least sunshine days is March (18.8 days).

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Average UV index in March
Port Costa, CA

Average UV index in March - Port Costa, CA
  • Average UV index in March: 4

The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).

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Average cloud cover in March
Port Costa, CA

Average cloud cover in March - Port Costa, 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 9).

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Average visibility in March
Port Costa, CA

Average visibility in March - Port Costa, CA
  • Average visibility in March: 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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Port Costa, California, USA

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