December weather forecast and climate
West Sacramento, CA

Weather in December

The first month of the winter, December, is still a cool month in West Sacramento, California, with average temperature fluctuating between 41.4°F (5.2°C) and 54.5°F (12.5°C).

Temperature

December is the coldest month, with an average high-temperature of 54.5°F (12.5°C) and an average low-temperature of 41.4°F (5.2°C).

Humidity

In December, the average relative humidity is 71%.

Rainfall

In West Sacramento, during 9.3 rainfall days, 1.3" (33mm) of precipitation is typically accumulated. In West Sacramento, during the entire year, the rain falls for 66.6 days and collects up to 7.6" (193mm) of precipitation.

Daylight

The month with the shortest days is December, with an average of 9.5h of daylight.

Sunshine

December has the least sunshine of the year in West Sacramento, 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, California. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to the UV radiation for the ordinary person.
Note: The daily maximum UV index of 3 interpret into the following advice:
Take precautions - Protection against the skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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 West Sacramento?

December is the coldest month in West Sacramento, California, with an average high-temperature of 54.5°F (12.5°C) and an average low-temperature of 41.4°F (5.2°C).

What is the temperature in December in West Sacramento?

In West Sacramento, in December, the average high-temperature is 54.5°F (12.5°C), and the average low-temperature is 41.4°F (5.2°C).

What is the average humidity in December in West Sacramento?

The average relative humidity in December in West Sacramento, California, is 71%.

How much does it rain in West Sacramento in December?

In West Sacramento, California, during December, the rain falls for 9.3 days and regularly aggregates up to 1.3" (33mm) of precipitation.

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

With an average of 9.5h of daylight, December has the shortest days of the year in West Sacramento.

What is the average length of the day in December in West Sacramento?

The average length of the day in December is 9.5h.

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

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

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

The average sunshine in December in West Sacramento is 5.5h.

When is the lowest UV index in West Sacramento?

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

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

In December, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a medium health risk from the exposure to the Sun's UV rays.

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"

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

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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: 9.5h

The month with the longest days is June (Average daylight: 14.8h).
The month with the shortest days is December (Average daylight: 9.5h).

  • Average sunshine in December: 5.5h

The month with the most sunshine is July (Average sunshine: 12.1h).
The month with the least sunshine is December (Average sunshine: 5.5h).

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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

Months with the highest UV index are June and July (UV index 7).
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

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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