December weather forecast
West Sacramento, CA

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Weather in December

December, the first month of the winter in West Sacramento, is also a fresh month, with an average temperature varying between 54.5°F and 41.4°F.

Temperature

December, recording an average high temperature of 54.5°F and a low temperature of 41.4°F, is West Sacramento's coldest month.

Humidity

In December, the average relative humidity is 71%.

Rainfall

In December, the rain falls for 9.3 days. Throughout December, 1.3" of precipitation is accumulated. Throughout the year, there are 66.6 rainfall days, and 7.6" of precipitation is accumulated.

Daylight

With an average of 9h and 30min of daylight, December has the shortest days of the year.
On the first day of December in West Sacramento, sunrise is at 7:04 am and sunset at 4:45 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 4:54 pm PST.

Sunshine

The month with the least sunshine in West Sacramento 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 West Sacramento. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for average individuals.
Note: The maximum UV index of 3 during December leads to these instructions:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. It's recommended to limit sun exposure when its radiation is at its peak during midday. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
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FAQ

What are the coldest months in West Sacramento?

The coldest period in West Sacramento is December, when temperatures fluctuate between an average high of 54.5°F and a low of 41.4°F.

What are the temperatures in West Sacramento in December?

The average high-temperature and low-temperature in West Sacramento, California, during December are 54.5°F and 41.4°F respectively. In September, the average heat index (a.k.a. 'apparent temperature', 'real feel'), which combines air temperature and relative humidity, is calculated to be 91.4°F.

What is the average humidity in December in West Sacramento?

In West Sacramento, the average relative humidity in December is 71%.

How many days does it rain in December in West Sacramento?

In December, in West Sacramento, the rain falls for 9.3 days. Throughout December, 1.3" of precipitation is accumulated.

What is the month with the shortest days in West Sacramento?

With an average of 9h and 30min of daylight, December has the shortest days of the year in West Sacramento.

How many hours of daylight does West Sacramento have in December?

In West Sacramento, the average day length in December is 9h and 31min.

When is the sunrise / sunset in December in West Sacramento?

In December, on the first day of the month, sunrise is at 7:04 am and sunset at 4:45 pm. On the last day of the month, in West Sacramento, sunrise is at 7:23 am and sunset at 4:54 pm PST.

What is the month with the least sunshine in West Sacramento?

With an average of 5.5h of sunshine, December has the least sunshine of the year.

How many hours of sunshine does West Sacramento have in December?

In December, the average sunshine duration in West Sacramento, California, is 5.5h.

What is the month with the lowest UV index in West Sacramento?

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

What is the UV index reading in December in West Sacramento?

In West Sacramento, California, the average daily maximum UV index in December is 3. A UV Index estimate of 3 to 5 represents a moderate vulnerability from unprotected exposure to UV radiation.
Average high temperature
Average low temperature
Average pressure
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
West Sacramento, CA

Average temperature in December - West Sacramento, CA
  • Average high temperature in December: 54.5°F

The warmest month (with the highest average high temperature) is July (94.6°F).
The month with the lowest average high temperature is December (54.5°F).

  • Average low temperature in December: 41.4°F

The month with the highest average low temperature is August (59.5°F).
The coldest month (with the lowest average low temperature) is December (41.4°F).

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Average pressure in December
West Sacramento, CA

Average pressure in December - West Sacramento, CA
  • Average pressure in December: 30.12"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

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Average wind speed in December
West Sacramento, CA

Average wind speed in December - West Sacramento, CA
  • Average wind speed in December: 5.8mph

The windiest month (with the highest average wind speed) is February (6.3mph).
The calmest months (with the lowest average wind speed) are September and November (5mph).

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Average humidity in December
West Sacramento, CA

Average humidity in December - West Sacramento, CA
  • Average humidity in December: 71%

The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is September (45%).

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Average rainfall in December
West Sacramento, CA

Average rainfall in December - West Sacramento, CA
  • Average rainfall in December: 1.3"

The wettest month (with the highest rainfall) is March (1.34").
The driest month (with the least rainfall) is August (0.04").

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Average rainfall days in December
West Sacramento, CA

Average rainfall days in December - West Sacramento, CA
  • Average rainfall days in December: 9.3 days

The month with the highest number of rainy days is March (12.4 days).
The month with the least rainy days is August (1.2 days).

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Average daylight in December /
Average sunshine in December
West Sacramento, CA

Average daylight in December / Average sunshine in December - West Sacramento, CA
  • Average daylight in December: 9h and 3min

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 30min).

  • Average sunshine in December: 5h and 3min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).

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Average sunshine days in December
West Sacramento, CA

Average sunshine days in December - West Sacramento, CA
  • Average sunshine days in December: 20.5 days

The month with the most sunshine days is July (29.4 days).
The month with the least sunshine days is March (17.7 days).

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Average UV index in December
West Sacramento, CA

Average UV index in December - West Sacramento, CA
  • Average UV index in December: 3

The months with the highest UV index are June and July (UV index 7).
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
West Sacramento, CA

Average cloud cover in December - West Sacramento, CA
  • Average cloud cover in December: 38

The month with the most cloud cover is March (Cloud cover 40).
The month with the least cloud cover is July (Cloud cover 6).

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Average visibility in December
West Sacramento, CA

Average visibility in December - West Sacramento, 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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West Sacramento, California, USA

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