December weather forecast
Auburn, CA

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The iconic US Auburn California Historic Landmark Courthouse
The iconic US Auburn California Historic Landmark Courthouse

Weather in December

The first month of the winter, December, is still a cool month in Auburn, California, with an average temperature fluctuating between 53.4°F (11.9°C) and 39.2°F (4°C).

Temperature

The month of December, characterized by an average high of 53.4°F (11.9°C) and a low of 39.2°F (4°C), is recognized as the coldest.

Humidity

In December, the average relative humidity is 68%.

Rainfall

In December, the rain falls for 11.5 days. Throughout December, 4.69" (119mm) of precipitation is accumulated. Throughout the year, there are 84.8 rainfall days, and 28.86" (733mm) of precipitation is accumulated.

Snowfall

February, March and December are months with snowfall. December is the first month it typically snows. Throughout December, in the average 0.3 snowfall days, it receives 0.63" (16mm) of snow. In Auburn, California, during the entire year, snow falls for 1.2 days and aggregates up to 2.09" (53mm) of snow.

Daylight

December has the shortest days of the year, with an average of 9h and 30min of daylight.
On the first day of December, sunrise is at 7:04 am and sunset at 4:42 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 4:52 pm PST.

Sunshine

The months with the least sunshine are January and December, with an average of 5.8h of sunshine.

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 of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the average person.
Note: The maximum UV index of 3 during December leads to these instructions:
Act with care - The suggestion to avoid sunburn is emphasized. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Enhance your sun protection with tightly woven, yet airy clothing. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.
Updated: Aug 24, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the coldest time of year?

December is the month that records the lowest temperatures, with averages ranging from a high of 53.4°F (11.9°C) to a low of 39.2°F (4°C).

What is the usual temperature for Auburn in December?

In Auburn, in December, the average high-temperature is 53.4°F (11.9°C), and the average low-temperature is 39.2°F (4°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, in September is computed to be 86°F (30°C).

What is the average humidity in December?

The average relative humidity in December is 68%.

How many days does it rain in December?

In Auburn, in December, during 11.5 rainfall days, 4.69" (119mm) of precipitation is typically accumulated.

When does it start to snow?

December is the first month it typically snows in Auburn. Throughout December, in the average 0.3 snowfall days, it receives 0.63" (16mm) of snow.

What is the month with the shortest days?

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

What is the average length of the day in December?

In Auburn, the average day length in December is 9h and 29min.

When are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:04 am and sunset at 4:42 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 4:52 pm PST.

What is the month with the least sunshine?

The months with the least sunshine are January and December, with an average of 5.8h of sunshine.

How many hours of sunshine does Auburn have in December?

In December, the average sunshine duration is 5.8h.

When is the lowest UV index?

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

How high is the UV index in December?

In Auburn, the average daily maximum UV index in December is 3. A UV Index value of 3 to 5 symbolizes a moderate health threat from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Auburn, CA

Average temperature in December - Auburn, CA
  • Average high temperature in December: 53.4°F

The warmest month (with the highest average high temperature) is July (91.9°F).
The month with the lowest average high temperature is December (53.4°F).

  • Average low temperature in December: 39.2°F

The month with the highest average low temperature is July (60.6°F).
The coldest month (with the lowest average low temperature) is December (39.2°F).

Average pressure in December
Auburn, CA

Average pressure in December - Auburn, CA
  • Average pressure in December: 30.13"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

Average wind speed in December
Auburn, CA

Average wind speed in December - Auburn, CA
  • Average wind speed in December: 4.9mph

The windiest months (with the highest average wind speed) are February and March (5.7mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).

Average humidity in December
Auburn, CA

Average humidity in December - Auburn, CA
  • Average humidity in December: 68%

The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is July (38%).

Average rainfall in December
Auburn, CA

Average rainfall in December - Auburn, CA
  • Average rainfall in December: 4.69"

The wettest month (with the highest rainfall) is March (5.63").
The driest months (with the least rainfall) are July and August (0.04").

Average rainfall days in December
Auburn, CA

Average rainfall days in December - Auburn, CA
  • Average rainfall days in December: 11.5 days

The month with the highest number of rainy days is March (15.4 days).
The month with the least rainy days is July (1 days).

Average snowfall in December
Auburn, CA

Average snowfall in December - Auburn, CA
  • Average snowfall in December: 0.63"

The month with the highest snowfall is February (1.18").
The months with the least snowfall are January, April, May, June, July, August, September, October and November (0").

Average snowfall days in December
Auburn, CA

Average snowfall days in December - Auburn, CA
  • Average snowfall days in December: 0.3 days

The month with the highest number of snowfall days is February (0.6 days).
The months with the least snowfall days are January, April, May, June, July, August, September, October and November (0 days).

Average daylight in December /
Average sunshine in December
Auburn, CA

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

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in December: 5h and 5min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The months with the least sunshine are January and December (Average sunshine: 5h and 48min).

Average sunshine days in December
Auburn, CA

Average sunshine days in December - Auburn, CA
  • Average sunshine days in December: 18.7 days

The month with the most sunshine days is July (29.6 days).
The month with the least sunshine days is March (14.6 days).

Average UV index in December
Auburn, CA

Average UV index in December - Auburn, 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
Auburn, CA

Average cloud cover in December - Auburn, CA
  • Average cloud cover in December: 34

The month with the most cloud cover is March (Cloud cover 41).
The month with the least cloud cover is July (Cloud cover 4).

Average visibility in December
Auburn, CA

Average visibility in December - Auburn, 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).

Auburn, California, USA

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