December weather forecastSacramento, CA
December
Weather in December
Sacramento closes the year with December showcasing a wintery mix, amid festive cheer. The month receives the highest amount of rainfall for the year at 1.3" (33mm), creating an inviting atmosphere for indoor activities. Local theatres, art galleries, and museums thrive in this weather, offering a diverse mix of cultural engagements. With relatively low temperatures in Sacramento during December, the River City prepares to bid adieu to the year. Outdoor decorations and holiday-themed cityscapes become a common sight, completely transforming Sacramento with season's greetings.Temperature
Sacramento's December weather, marked by an average high temperature of 54.5°F (12.5°C) and an average low temperature of 41.4°F (5.2°C), is the coldest in the year.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. Throughout the year, there are 66.6 rainfall days, and 7.6" (193mm) of precipitation is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 30min of daylight.On the first day of December in Sacramento, sunrise is at 7:05 am and sunset at 4:45 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 4:55 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 health risk from exposure to the Sun's UV rays for average individuals.Note: The daily high UV index of 3 during December translates into the following recommendations:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. 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.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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"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).
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: 9h and 30min
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 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).
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
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).
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
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).
