December weather forecast
Bolinas, CA

Share

Weather in December

December, the first month of the winter in Bolinas, is still a cool month, with an average temperature varying between 55.2°F (12.9°C) and 46°F (7.8°C).

Temperature

In Bolinas, the month of December is known for its lowest average temperatures, reaching a high of 55.2°F (12.9°C) and a low of 46°F (7.8°C).

Humidity

In December, the average relative humidity is 73%.

Rainfall

In Bolinas, in December, it is raining for 10.9 days, with typically 2.83" (72mm) of accumulated precipitation. Throughout the year, there are 80.3 rainfall days, and 15.98" (406mm) of precipitation is accumulated.

Snowfall

December is the only month when snow falls in Bolinas. The month with the most snowfall days is December, when snow falls for 0.1 days.

Ocean temperature

In Bolinas, California, the average seawater temperature in December is 54.3°F (12.4°C).
Note: Swimming in 54.3°F (12.4°C) feels unbearing at 55.4°F (13°C) and can be life-risking below 50°F (10°C), causing breathing issues and cold shock, depending on a person's capacity.

Daylight

December has the shortest days of the year in Bolinas, with an average of 9h and 36min of daylight.
On the first day of December, sunrise is at 7:08 am and sunset at 4:51 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 5:01 pm PST.

Sunshine

December has the least sunshine of the year in Bolinas, with an average of 5.6h of sunshine.

UV index

The months with the lowest UV index are February, November and December, with an average maximum UV index of 3. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.
Note: The maximum daily UV index of 3 in December interprets into the following recommendations:
Be vigilant - Suggestions to stave off sun damage are provided. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.
[Resources]

Frequently asked questions

What time of the year is the coldest in Bolinas?

With average temperatures fluctuating between a high of 55.2°F (12.9°C) and a low of 46°F (7.8°C), December stands out as the coldest month in Bolinas.

What are the temperatures in Bolinas in December?

Bolinas in December has an average high-temperature of 55.2°F (12.9°C) and an average low-temperature of 46°F (7.8°C).

What is the average humidity in December in Bolinas?

In December, the average relative humidity in Bolinas is 73%.

How much does it rain in Bolinas in December?

In December, in Bolinas, the rain falls for 10.9 days. Throughout December, 2.83" (72mm) of precipitation is accumulated.

What is the snowiest month in Bolinas?

December has the most snowfall days of the year in Bolinas, California. Snow falls for 0.1 days.

When does it start to snow in Bolinas?

December is the first month it typically snows. Throughout December, there are 0.1 snowfall days.

How cold is the water in December in Bolinas?

In December, the average ocean temperature is 54.3°F (12.4°C). Swimming in 54.3°F (12.4°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

What is the month with the shortest days in Bolinas?

With an average of 9h and 36min of daylight, December has the shortest days of the year.

What is the average length of the day in December in Bolinas?

In December, the average day length in Bolinas is 9h and 35min.

When is the sunrise / sunset in December in Bolinas?

On the first day of December in Bolinas, sunrise is at 7:08 am and sunset at 4:51 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 5:01 pm PST.

What is the month with the least sunshine in Bolinas?

December has the least sunshine of the year in Bolinas, with an average of 5.6h of sunshine.

How long on average sun shines in December in Bolinas?

In Bolinas, the average sunshine duration in December is 5.6h.

What are the months with the lowest UV index in Bolinas?

The months with the lowest UV index in Bolinas, California, are February, November and December, with an average maximum UV index of 3.

What is the UV index intensity in December in Bolinas?

The average daily maximum UV index in December is 3. A UV Index estimate of 3 to 5 represents a moderate vulnerability from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Bolinas, CA

Average temperature in December - Bolinas, CA
  • Average high temperature in December: 55.2°F

The warmest month (with the highest average high temperature) is September (70.9°F).
The month with the lowest average high temperature is December (55.2°F).

  • Average low temperature in December: 46°F

The month with the highest average low temperature is September (56.3°F).
The coldest month (with the lowest average low temperature) is December (46°F).

[Resources]

Average pressure in December
Bolinas, CA

Average pressure in December - Bolinas, CA
  • Average pressure in December: 30.1"Hg

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

[Resources]

Average wind speed in December
Bolinas, CA

Average wind speed in December - Bolinas, CA
  • Average wind speed in December: 6.7mph

The windiest months (with the highest average wind speed) are April and May (8.3mph).
The calmest month (with the lowest average wind speed) is November (5.9mph).

[Resources]

Average humidity in December
Bolinas, CA

Average humidity in December - Bolinas, CA
  • Average humidity in December: 73%

The month with the highest relative humidity is August (78%).
The month with the lowest relative humidity is October (69%).

[Resources]

Average rainfall in December
Bolinas, CA

Average rainfall in December - Bolinas, CA
  • Average rainfall in December: 2.83"

The wettest month (with the highest rainfall) is February (3.43").
The driest months (with the least rainfall) are July and August (0.08").

[Resources]

Average rainfall days in December
Bolinas, CA

Average rainfall days in December - Bolinas, CA
  • Average rainfall days in December: 10.9 days

The month with the highest number of rainy days is March (12.8 days).
The month with the least rainy days is July (2.3 days).

[Resources]

Average snowfall days in December
Bolinas, CA

Average snowfall days in December - Bolinas, CA
  • Average snowfall days in December: 0.1 days

The month with the highest number of snowfall days is December (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).

[Resources]

Average sea temperature in December
Bolinas, CA

Average sea temperature in December - Bolinas, CA
  • Average sea temperature in December: 54.3°F

The best month for swimming (with the highest average sea temperature) is September (56.9°F).
The coldest month (with the lowest average sea temperature) is June (52.4°F).

[Resources]

Average daylight in December /
Average sunshine in December
Bolinas, CA

Average daylight in December / Average sunshine in December - Bolinas, CA
  • Average daylight in December: 9h and 4min

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 December: 5h and 4min

The month with the most sunshine is July (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 36min).

[Resources]

Average sunshine days in December
Bolinas, CA

Average sunshine days in December - Bolinas, CA
  • Average sunshine days in December: 18.7 days

The months with the most sunshine days are June and July (24.8 days).
The month with the least sunshine days is March (16.6 days).

[Resources]

Average UV index in December
Bolinas, CA

Average UV index in December - Bolinas, CA
  • Average UV index in December: 3

The months with the highest UV index are June, July, August and September (UV index 5).
The months with the lowest UV index are February, November and December (UV index 3).

[Resources]

Average cloud cover in December
Bolinas, CA

Average cloud cover in December - Bolinas, CA
  • Average cloud cover in December: 37

The month with the most cloud cover is March (Cloud cover 39).
The month with the least cloud cover is September (Cloud cover 19).

[Resources]

Average visibility in December
Bolinas, CA

Average visibility in December - Bolinas, 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).

[Resources]

Bolinas, California, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location