December weather forecast and climate
Sacramento, CA

The State Capitol Building in Sacramento, California
The State Capitol Building in Sacramento, California
The first month of the winter, December, is also a fresh month in Sacramento, California, with average temperature varying between 41.4°F (5.2°C) and 54.5°F (12.5°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 December, the average relative humidity is 71%.

Rainfall

In Sacramento, it is raining for 9.3 days, with typically 1.3" (33mm) of accumulated precipitation. Throughout the year, there are 66.6 rainfall days, and 7.6" (193mm) of precipitation is accumulated.

Daylight

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

Sunshine

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

UV index

January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index in Sacramento. A UV Index reading of 3 to 5 represents a medium health hazard from the exposure to the Sun's UV radiation for average individuals.
Note: The average daily UV index of 3 transform into the following instructions:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

What is the coldest month in Sacramento?

December 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).

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).

What is the average humidity in December in Sacramento?

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

How much does it rain in Sacramento in December?

In December, in Sacramento, California, the rain falls for 9.3 days. Throughout December, 1.3" (33mm) of precipitation is accumulated.

What is the month with the shortest days in Sacramento?

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

How many hours of daylight does Sacramento have in December?

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

What is the month with the least sunshine in Sacramento?

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

How long on average sun shines in December in Sacramento?

The average sunshine in December is 5.5h.

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

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

How high is the UV index in December in Sacramento?

The average daily maximum UV index in December is 3. A UV Index estimate of 3 to 5 represents a moderate health threat from unprotected exposure to the UV radiation.
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).

Average pressure in December - 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").

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).

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%).

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").

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).

Average daylight in December / Average sunshine in December - 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).

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).

Average UV index in December - 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).

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).

Average visibility in December - 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).