December weather forecast and climate
Pierpont Bay, CA

Weather in December

The first month of the winter, December, is still a mild month in Pierpont Bay, California, with average temperature varying between 50°F (10°C) and 59.5°F (15.3°C).

Temperature

In December, the average high-temperature marginally drops, from a comfortable 64.9°F (18.3°C) in November, to a moderate 59.5°F (15.3°C). The average low-temperature, in Pierpont Bay, is 50°F (10°C).

Humidity

In December, the average relative humidity in Pierpont Bay is 59%.

Rainfall

In Pierpont Bay, during December, the rain falls for 5.5 days and regularly aggregates up to 1.14" (29mm) of precipitation. Throughout the year, there are 47.8 rainfall days, and 6.97" (177mm) of precipitation is accumulated.

Daylight

December has the shortest days of the year in Pierpont Bay, with an average of 9.9h of daylight.

Sunshine

January, February and December, with an average of 6.8h of sunshine, are months with the least sunshine.

UV index

With an average maximum UV index of 3, December is the month with the lowest UV index. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to the UV radiation for the average person.
Note: The average daily UV index of 3 in December transform into the following instructions:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in December in Pierpont Bay?

In December, the average high-temperature is 59.5°F (15.3°C), and the average low-temperature is 50°F (10°C).

What is the average humidity in December in Pierpont Bay?

In Pierpont Bay, California, the average relative humidity in December is 59%.

How many days does it rain in December in Pierpont Bay?

In December, in Pierpont Bay, the rain falls for 5.5 days. Throughout December, 1.14" (29mm) of precipitation is accumulated.

What is the month with the shortest days in Pierpont Bay?

December has the shortest days of the year, with an average of 9.9h of daylight.

What is the average length of the day in December in Pierpont Bay?

The average length of the day in December in Pierpont Bay, California, is 9.9h.

What is the month with the least sunshine in Pierpont Bay?

Months with the least sunshine are January, February and December, with an average of 6.8h of sunshine.

How many hours of sunshine does Pierpont Bay have in December?

In December, the average sunshine in Pierpont Bay is 6.8h.

What is the month with the lowest UV index in Pierpont Bay?

December is the month with the lowest UV index in Pierpont Bay, California, with an average maximum UV index of 3.

What is the UV index reading in December in Pierpont Bay?

The average daily maximum UV index in December in Pierpont Bay, California, is 3. A UV Index of 3 to 5 symbolizes a medium health risk from unsafe exposure to the Sun's UV rays.

Average temperature in December
Pierpont Bay, CA

Average temperature in December - Pierpont Bay, CA
  • Average high temperature in December: 59.5°F

The warmest months (with the highest average high temperature) are August and September (74.3°F).
The month with the lowest average high temperature is February (59°F).

  • Average low temperature in December: 50°F

The month with the highest average low temperature is August (62.6°F).
The coldest month (with the lowest average low temperature) is February (48.9°F).

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Average pressure in December
Pierpont Bay, CA

Average pressure in December - Pierpont Bay, CA
  • Average pressure in December: 30.08"

The month with the highest atmospheric pressure is January (30.11").
The month with the lowest atmospheric pressure is September (29.9").

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Average wind speed in December
Pierpont Bay, CA

Average wind speed in December - Pierpont Bay, CA
  • Average wind speed in December: 6.5mph

The windiest month (with the highest average wind speed) is April (7.1mph).
The calmest months (with the lowest average wind speed) are August and September (5mph).

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Average humidity in December
Pierpont Bay, CA

Average humidity in December - Pierpont Bay, CA
  • Average humidity in December: 59%

Months with the highest relative humidity are June and July (69%).
The month with the lowest relative humidity is November (56%).

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Average rainfall in December
Pierpont Bay, CA

Average rainfall in December - Pierpont Bay, CA
  • Average rainfall in December: 1.14"

The wettest month (with the highest rainfall) is January (1.34").
The driest month (with the least rainfall) is June (0.12").

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Average rainfall days in December
Pierpont Bay, CA

Average rainfall days in December - Pierpont Bay, CA
  • Average rainfall days in December: 5.5 days

The month with the highest number of rainy days is March (6 days).
The month with the least rainy days is August (2.1 days).

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Average daylight in December /
Average sunshine in December
Pierpont Bay, CA

Average daylight in December / Average sunshine in December - Pierpont Bay, CA
  • Average daylight in December: 9.9h

The month with the longest days is June (Average daylight: 14.4h).
The month with the shortest days is December (Average daylight: 9.9h).

  • Average sunshine in December: 6.8h

Months with the most sunshine are July and August (Average sunshine: 12h).
Months with the least sunshine are January, February and December (Average sunshine: 6.8).

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Average sunshine days in December
Pierpont Bay, CA

Average sunshine days in December - Pierpont Bay, CA
  • Average sunshine days in December: 24.6 days

The month with the most sunshine days is October (26 days).
The month with the least sunshine days is July (20.4 days).

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Average UV index in December
Pierpont Bay, CA

Average UV index in December - Pierpont Bay, CA
  • Average UV index in December: 3

The month with the highest UV index is August (UV index 6).
The month with the lowest UV index is December (UV index 3).

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Average cloud cover in December
Pierpont Bay, CA

Average cloud cover in December - Pierpont Bay, CA
  • Average cloud cover in December: 21

The month with the most cloud cover is March (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 5).

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Average visibility in December
Pierpont Bay, CA

Average visibility in December - Pierpont Bay, CA
  • Average visibility in December: 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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