December weather forecastAurora, CA

December

Weather in December

The first month of the winter, December, is also a moderate month in Aurora, California, with an average temperature ranging between max 55.6°F (13.1°C) and min 41.9°F (5.5°C).

Temperature

Aurora's coldest temperatures are experienced in December, with average high temperatures of 55.6°F (13.1°C) and lows of 41.9°F (5.5°C).

Humidity

The average relative humidity in December is 70%.

Rainfall

In Aurora, in December, it is raining for 8.2 days, with typically 1.22" (31mm) of accumulated precipitation. In Aurora, during the entire year, the rain falls for 54.3 days and collects up to 6.54" (166mm) of precipitation.

Daylight

With an average of 9h and 36min of daylight, December has the shortest days of the year.
On the first day of December in Aurora, sunrise is at 7:01 am and sunset at 4:45 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 4:55 pm PST.

Sunshine

With an average of 6h of sunshine, December has the least sunshine of the year in Aurora.

UV index

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 3. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the average person.
Note: The average daily UV index of 3 in December transforms into the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Updated: Jun 23, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Aurora notes the coldest temperatures in December, with a average high of 55.6°F (13.1°C) and a low of 41.9°F (5.5°C).

The high-temperature, in December, in Aurora, records 55.6°F (13.1°C), while the low-temperature is 41.9°F (5.5°C). The average heat index (a.k.a. 'apparent temperature', 'real feel'), which represents the influence of relative humidity on air temperature, in September is evaluated at 93.2°F (34°C).

In Aurora, the average relative humidity in December is 70%.

In Aurora, in December, during 8.2 rainfall days, 1.22" (31mm) of precipitation is typically accumulated.

December has the shortest days of the year in Aurora, with an average of 9h and 36min of daylight.

In Aurora, the average day length in December is 9h and 37min.

In December, on the first day of the month, sunrise is at 7:01 am and sunset at 4:45 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 4:55 pm PST.

December has the least sunshine of the year, with an average of 6h of sunshine.

In December, the average sunshine duration in Aurora is 6h.

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

The average daily maximum UV index in December is 3. A UV Index of 3 to 5 symbolizes a medium health risk from unsafe exposure to Sun's UV rays.
Average high temperature
Average low temperature
Average pressure
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Aurora, CA

  • Average high temperature in December: 55.6°F

The warmest month (with the highest average high temperature) is July (97.7°F).
The month with the lowest average high temperature is December (55.6°F).

  • Average low temperature in December: 41.9°F

The month with the highest average low temperature is July (62.1°F).
The coldest months (with the lowest average low temperature) are January and December (41.9°F).

Average pressure in December
Aurora, 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 (29.91"Hg).

Average wind speed in December
Aurora, CA

  • Average wind speed in December: 5.7mph

The windiest month (with the highest average wind speed) is June (7.3mph).
The calmest month (with the lowest average wind speed) is November (5.2mph).

Average humidity in December
Aurora, CA

  • Average humidity in December: 70%

The month with the highest relative humidity is January (72%).
The month with the lowest relative humidity is July (37%).

Average rainfall in December
Aurora, CA

  • Average rainfall in December: 1.22"

The wettest month (with the highest rainfall) is March (1.3").
The driest months (with the least rainfall) are July and August (0.04").

Average rainfall days in December
Aurora, CA

  • Average rainfall days in December: 8.2 days

The month with the highest number of rainy days is March (10.3 days).
The month with the least rainy days is August (0.9 days).

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

  • Average daylight in December: 9h and 36min

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in December: 6h and 0min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).

Average sunshine days in December
Aurora, CA

  • Average sunshine days in December: 22 days

The month with the most sunshine days is August (29.2 days).
The month with the least sunshine days is March (19.6 days).

Average UV index in December
Aurora, CA

  • Average UV index in December: 3

The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).

Average cloud cover in December
Aurora, CA

  • Average cloud cover in December: 32

The month with the most cloud cover is March (Cloud cover 33).
The month with the least cloud cover is July (Cloud cover 4).

Average visibility in December
Aurora, 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).