December weather forecast
Sacramento, CA

The State Capitol Building in Sacramento, California
The State Capitol Building in Sacramento, California

Weather in December

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

Temperature

The coldest month is December, 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 Sacramento, the average relative humidity in December is 71%.

Rainfall

In Sacramento, during December, the rain falls for 9.3 days and regularly aggregates up to 1.3" (33mm) of precipitation. In 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 in Sacramento is December, with an average of 9h and 31min of daylight.
On the first day of December, 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

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

UV index

January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index. 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: In December, the average maximum UV index of 3 translate into the following recommendations:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the coldest month in Sacramento?

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

What is the temperature in December in Sacramento?

In Sacramento, California, 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). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which combines air temperature and relative humidity, in September is evaluated at 91.4°F (33°C).

What is the average humidity in December in Sacramento?

The average relative humidity in December in Sacramento is 71%.

How many days does it rain in December in Sacramento?

In Sacramento, in December, during 9.3 rainfall days, 1.3" (33mm) of precipitation is typically accumulated.

What is the month with the shortest days in Sacramento?

With an average of 9h and 31min of daylight, December has the shortest days of the year in Sacramento, California.

How many hours of daylight does Sacramento have in December?

The average day length in December is 9h and 31min.

What time are sunrise and sunset in December in 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 Sacramento, sunrise is at 7:23 am and sunset at 4:54 pm PST.

What is the month with the least sunshine in Sacramento?

December has the least sunshine of the year in Sacramento, with an average of 5.5h of sunshine.

How many hours of sunshine does Sacramento have in December?

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

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

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

How high is the UV index in December in Sacramento?

In December, the average daily maximum UV index in Sacramento is 3. A UV Index reading of 3 to 5 represents a medium health risk from unsafe 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
Sacramento, CA

Average temperature in December - 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
Sacramento, CA

Average pressure in December - 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
Sacramento, CA

Average wind speed in December - 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
Sacramento, CA

Average humidity in December - 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
Sacramento, CA

Average rainfall in December - 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
Sacramento, CA

Average rainfall days in December - 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
Sacramento, CA

Average daylight in December / Average sunshine in December - Sacramento, CA
  • Average daylight in December: 9h and 31min

The month with the longest days is June (Average daylight: 14h and 49min).
The month with the shortest days is December (Average daylight: 9h and 31min).

  • Average sunshine in December: 5h and 30min

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
Sacramento, CA

Average sunshine days in December - 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
Sacramento, CA

Average UV index in December - 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
Sacramento, CA

Average cloud cover in December - 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
Sacramento, CA

Average visibility in December - 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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