December weather forecast
Larkspur, CA

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Weather in December

December, the first month of the winter in Larkspur, is still a refreshing month, with an average temperature ranging between max 55.4°F (13°C) and min 45.3°F (7.4°C).

Temperature

December is the month when Larkspur, California, experiences its coldest temperatures, averaging a high of 55.4°F (13°C) and a low of 45.3°F (7.4°C).

Humidity

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

Rainfall

In Larkspur, California, in December, it is raining for 7.2 days, with typically 0.67" (17mm) of accumulated precipitation. In Larkspur, California, during the entire year, the rain falls for 48 days and collects up to 3.94" (100mm) of precipitation.

Daylight

December has the shortest days of the year in Larkspur, with an average of 9h and 36min of daylight.
On the first day of December, sunrise is at 7:07 am and sunset at 4:51 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 5:01 pm PST.

Sunshine

The month with the least sunshine in Larkspur, California, is December, with an average of 5.5h of sunshine.

UV index

January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index in Larkspur. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the average person.
Note: An average UV index of 3 in December transforms into this advice:
Guard yourself - Avoiding sunburn is suggested. To guard against the harmful effects of the Sun, minimize exposure during midday. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
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Frequently asked questions

What part of the year is the coldest in Larkspur?

With its average high temperature of 55.4°F (13°C) and a low of 45.3°F (7.4°C), December is regarded as the coldest month in Larkspur.

What is the usual temperature for Larkspur in December?

An average high-temperature, in December, in Larkspur, is 55.4°F (13°C) and the average low-temperature is 45.3°F (7.4°C).

What is the average humidity in December in Larkspur?

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

How much does it rain in Larkspur in December?

In Larkspur, in December, during 7.2 rainfall days, 0.67" (17mm) of precipitation is typically accumulated.

What is the month with the shortest days in Larkspur?

The month with the shortest days in Larkspur is December, with an average of 9h and 36min of daylight.

How many hours of daylight does Larkspur have in December?

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

When are sunrise and sunset in December in Larkspur?

In December, on the first day of the month, sunrise is at 7:07 am and sunset at 4:51 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 5:01 pm PST.

What is the month with the least sunshine in Larkspur?

The month with the least sunshine in Larkspur, California, is December, with an average of 5.5h of sunshine.

How long on average sun shines in December in Larkspur?

In Larkspur, the average sunshine duration in December is 5.5h.

When is the lowest UV index in Larkspur?

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

What is the UV index intensity in December in Larkspur?

The average daily maximum UV index in December is 3. A UV Index value of 3 to 5 symbolizes a medium health risk from 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 December
Larkspur, CA

Average temperature in December - Larkspur, CA
  • Average high temperature in December: 55.4°F

The warmest month (with the highest average high temperature) is September (72.3°F).
The month with the lowest average high temperature is December (55.4°F).

  • Average low temperature in December: 45.3°F

The month with the highest average low temperature is September (56.1°F).
The coldest month (with the lowest average low temperature) is December (45.3°F).

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Average pressure in December
Larkspur, CA

Average pressure in December - Larkspur, 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).

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Average wind speed in December
Larkspur, CA

Average wind speed in December - Larkspur, CA
  • Average wind speed in December: 6.2mph

The windiest month (with the highest average wind speed) is May (7.8mph).
The calmest months (with the lowest average wind speed) are October and November (5.5mph).

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Average humidity in December
Larkspur, CA

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

The month with the highest relative humidity is March (77%).
The month with the lowest relative humidity is October (68%).

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Average rainfall in December
Larkspur, CA

Average rainfall in December - Larkspur, CA
  • Average rainfall in December: 0.67"

The wettest month (with the highest rainfall) is February (0.87").
The driest months (with the least rainfall) are June, July, August and September (0.04").

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Average rainfall days in December
Larkspur, CA

Average rainfall days in December - Larkspur, CA
  • Average rainfall days in December: 7.2 days

The month with the highest number of rainy days is March (8.8 days).
The months with the least rainy days are June and August (1.2 days).

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

Average daylight in December / Average sunshine in December - Larkspur, 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 3min

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 30min).

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Average sunshine days in December
Larkspur, CA

Average sunshine days in December - Larkspur, CA
  • Average sunshine days in December: 22.1 days

The month with the most sunshine days is June (26.4 days).
The month with the least sunshine days is March (20.7 days).

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Average UV index in December
Larkspur, CA

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

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

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Average cloud cover in December
Larkspur, CA

Average cloud cover in December - Larkspur, CA
  • Average cloud cover in December: 38

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

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Average visibility in December
Larkspur, CA

Average visibility in December - Larkspur, 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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Larkspur, California, USA

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