December weather forecast
Pismo Beach, CA

Weather in December

December, the first month of the winter in Pismo Beach, is also an enjoyable month, with temperature in the range of an average high of 61.2°F (16.2°C) and an average low of 46.8°F (8.2°C).

Temperature

With an average high-temperature of 61.2°F (16.2°C) and an average low-temperature of 46.8°F (8.2°C), December is the coldest month.

Humidity

In Pismo Beach, the average relative humidity in December is 63%.

Rainfall

In December, in Pismo Beach, the rain falls for 6.4 days. Throughout December, 1.02" (26mm) of precipitation is accumulated. Throughout the year, there are 47.6 rainfall days, and 6.93" (176mm) of precipitation is accumulated.

Ocean temperature

In December, the average ocean temperature in Pismo Beach, California, is 57.6°F (14.2°C).
Note: Swimming in 57.6°F (14.2°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

The month with the shortest days in Pismo Beach is December, with an average of 9h and 50min of daylight.
On the first day of December, sunrise is at 6:52 am and sunset at 4:50 pm. On the last day of the month, sunrise is at 7:10 am and sunset at 5:00 pm PST.

Sunshine

The months with the least sunshine are February and December, with an average of 6.5h of sunshine.

UV index

January through March, November and December, with an average maximum UV index of 4, are months with the lowest UV index. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 4 in December transform into the following instructions:
Take precautions - Protection against sun damage is advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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 coldest month in Pismo Beach?

With an average high-temperature of 61.2°F (16.2°C) and an average low-temperature of 46.8°F (8.2°C), December is the coldest month in Pismo Beach, California.

What is the temperature in December in Pismo Beach?

In Pismo Beach, California, in December, the average high-temperature is 61.2°F (16.2°C), and the average low-temperature is 46.8°F (8.2°C).

What is the average humidity in December in Pismo Beach?

In Pismo Beach, the average relative humidity in December is 63%.

How many days does it rain in December in Pismo Beach?

In Pismo Beach, in December, during 6.4 rainfall days, 1.02" (26mm) of precipitation is typically accumulated.

What is the ocean temperature in December in Pismo Beach?

In December, the average ocean temperature in Pismo Beach, California, is 57.6°F (14.2°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 month with the shortest days in Pismo Beach?

December has the shortest days of the year, with an average of 9h and 50min of daylight.

How many hours of daylight does Pismo Beach have in December?

The average day length in December in Pismo Beach, California, is 9h and 50min.

When is the sunrise / sunset in December in Pismo Beach?

In December, on the first day of the month, sunrise is at 6:52 am and sunset at 4:50 pm. On the last day of the month, in Pismo Beach, sunrise is at 7:10 am and sunset at 5:00 pm PST.

What are the months with the least sunshine in Pismo Beach?

The months with the least sunshine are February and December, with an average of 6.5h of sunshine.

How long on average sun shines in December in Pismo Beach?

In December, the average sunshine duration is 6.5h.

When is the lowest UV index in Pismo Beach?

January through March, November and December, with an average maximum UV index of 4, are months with the lowest UV index in Pismo Beach.

What is the UV index intensity in December in Pismo Beach?

The average daily maximum UV index in December in Pismo Beach, California, is 4. 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 sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Pismo Beach, CA

Average temperature in December - Pismo Beach, CA
  • Average high temperature in December: 61.2°F

The warmest month (with the highest average high temperature) is September (79.5°F).
The month with the lowest average high temperature is December (61.2°F).

  • Average low temperature in December: 46.8°F

The month with the highest average low temperature is September (59.9°F).
The coldest month (with the lowest average low temperature) is February (46°F).

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Average pressure in December
Pismo Beach, CA

Average pressure in December - Pismo Beach, CA
  • Average pressure in December: 30.09"Hg

The month with the highest atmospheric pressure is January (30.12"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.91"Hg).

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Average wind speed in December
Pismo Beach, CA

Average wind speed in December - Pismo Beach, CA
  • Average wind speed in December: 6.5mph

The windiest months (with the highest average wind speed) are April and May (7.3mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).

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Average humidity in December
Pismo Beach, CA

Average humidity in December - Pismo Beach, CA
  • Average humidity in December: 63%

The month with the highest relative humidity is March (68%).
The month with the lowest relative humidity is October (58%).

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Average rainfall in December
Pismo Beach, CA

Average rainfall in December - Pismo Beach, CA
  • Average rainfall in December: 1.02"

The wettest month (with the highest rainfall) is March (1.61").
The driest months (with the least rainfall) are June and August (0.04").

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Average rainfall days in December
Pismo Beach, CA

Average rainfall days in December - Pismo Beach, CA
  • Average rainfall days in December: 6.4 days

The month with the highest number of rainy days is March (8.4 days).
The month with the least rainy days is August (0.8 days).

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Average sea temperature in December
Pismo Beach, CA

Average sea temperature in December - Pismo Beach, CA
  • Average sea temperature in December: 57.5°F

The best months for swimming (with the highest average sea temperature) are August and October (58.6°F).
The coldest month (with the lowest average sea temperature) is April (54.3°F).

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Average daylight in December /
Average sunshine in December
Pismo Beach, CA

Average daylight in December / Average sunshine in December - Pismo Beach, CA
  • Average daylight in December: 9h and 50min

The month with the longest days is June (Average daylight: 14h and 29min).
The month with the shortest days is December (Average daylight: 9h and 50min).

  • Average sunshine in December: 6h and 30min

The months with the most sunshine are June, July and August (Average sunshine: 12h and 0min).
The months with the least sunshine are February and December (Average sunshine: 6h and 30min).

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Average sunshine days in December
Pismo Beach, CA

Average sunshine days in December - Pismo Beach, CA
  • Average sunshine days in December: 24 days

The month with the most sunshine days is August (29.6 days).
The month with the least sunshine days is February (21 days).

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Average UV index in December
Pismo Beach, CA

Average UV index in December - Pismo Beach, CA
  • Average UV index in December: 4

The months with the highest UV index are June and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 4).

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Average cloud cover in December
Pismo Beach, CA

Average cloud cover in December - Pismo Beach, CA
  • Average cloud cover in December: 25

The month with the most cloud cover is March (Cloud cover 27).
The month with the least cloud cover is August (Cloud cover 6).

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Average visibility in December
Pismo Beach, CA

Average visibility in December - Pismo Beach, CA
  • Average visibility in December: 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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