December Weather in South Whittier, United States

Last updated: June 24, 2025

In December, the average temperature in South Whittier, United States hovers around 13°C (56°F). Expect a minimum of 3°C (37°F) and a pleasant maximum of 27°C (82°F). Throughout the month, precipitation averages 72 mm (2.8 in) spread over 4 days, while the average humidity lingers at a comfortable 71%.

December Temperature in South Whittier

In December in South Whittier, the average temperature is 13°C (56°F), with maximums reaching up to 27°C (82°F) and minimums dropping as low as 3°C (37°F). This makes it an ideal time for travelers to enjoy mild weather while exploring all that South Whittier has to offer.

December Weather in South Whittier: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in South Whittier, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In South Whittier, December typically has an average temperature of 13°C (56°F), with highs reaching up to 27°C (82°F) and lows dropping to around 3°C (37°F).

Data source: Temperature data for South Whittier generated using information from the Copernicus Climate Change Service.

December Precipitation in South Whittier

In South Whittier in December, the precipitation amount is 72 mm (2.8 in) over the course of 4 days.

December Precipitation Trends in South Whittier

The chart displays monthly precipitation patterns in South Whittier, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In South Whittier, December typically receives around 72 mm (2.8 inches) of precipitation spread over approximately 4 days.

Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

December Humidity in South Whittier

In South Whittier in December humidity is 71%. With an average temperature of 13°C (56°F), this humidity feels like a damp embrace that can make exploring the area feel a bit stifling and requires light, breathable clothing to remain comfortable while traveling.

December Average Humidity in South Whittier

This chart illustrates the average monthly humidity levels in South Whittier, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in South Whittier is approximately 71%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in South Whittier

In South Whittier in December, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in South Whittier for better planning.

Maximum UV Index Levels in South Whittier for December

The chart shows the monthly maximum UV Index (UVI) for South Whittier in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In December, the maximum UV index in South Whittier typically reaches 4, which falls under the moderate exposure category.

Data source: South Whittier December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How December Weather in South Whittier Compares to Other Months

Weather in South Whittier varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in South Whittier, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in South Whittier, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	13°C (56°F)	75 mm (3.0 inches)	74%	moderate
February Weather	13°C (56°F)	63 mm (2.5 inches)	79%	high
March Weather	14°C (58°F)	67 mm (2.7 inches)	75%	very high
April Weather	17°C (63°F)	23 mm (0.9 inches)	70%	very high
May Weather	18°C (65°F)	16 mm (0.6 inches)	70%	very high
June Weather	21°C (70°F)	3 mm (0.1 inches)	72%	extreme
July Weather	24°C (76°F)	2 mm (0.1 inches)	73%	extreme
August Weather	25°C (76°F)	2 mm (0.1 inches)	69%	very high
September Weather	23°C (74°F)	4 mm (0.1 inches)	68%	very high
October Weather	20°C (69°F)	10 mm (0.4 inches)	67%	high
November Weather	17°C (62°F)	20 mm (0.8 inches)	68%	moderate
December Weather	13°C (56°F)	72 mm (2.8 inches)	71%	moderate