December Weather in Pierce, United States

Last updated: June 24, 2025

In December, the average temperature in Pierce, United States hovers around -2°C (29°F). Expect chilly nights where temperatures can plummet to a minimum of -25°C (-12°F), while daytime highs can reach up to 18°C (66°F). During this month, 44 mm (1.8 in) of precipitation typically falls over 4 days, and the air remains quite humid with an average humidity of 79%.

December Temperature in Pierce

In December in Pierce, the average temperature is -2°C (29°F), with maximums reaching up to 18°C (66°F) and minimums plummeting to as low as -25°C (-12°F). Be prepared for a wide range of temperatures when traveling to Pierce this month.

December Weather in Pierce: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Pierce, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Pierce, December typically has an average temperature of -2°C (29°F), with highs reaching up to 18°C (66°F) and lows dropping to around -25°C (-12°F).

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

December Precipitation in Pierce

In Pierce in December, the precipitation amount is 44 mm (1.8 in) over the course of 4 days.

December Precipitation Trends in Pierce

The chart displays monthly precipitation patterns in Pierce, 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 Pierce, December typically receives around 44 mm (1.8 inches) of precipitation spread over approximately 4 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

December Humidity in Pierce

In Pierce in December, humidity is 79%. With an average temperature of -2°C (29°F), this humidity feels like a heavy, bone-chilling dampness that can make traveling quite uncomfortable and intensifies the cold.

December Average Humidity in Pierce

This chart illustrates the average monthly humidity levels in Pierce, 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 Pierce is approximately 79%, 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 Pierce

In Pierce in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Pierce, you can visit Hourly UV Index in Pierce.

Maximum UV Index Levels in Pierce for December

The chart shows the monthly maximum UV Index (UVI) for Pierce 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 Pierce typically reaches 2, which falls under the low exposure category.

Data source: Pierce 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 Pierce Compares to Other Months

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

This table compares monthly weather conditions in Pierce, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-5°C (23°F)	26 mm (1.0 inches)	77%	moderate
February Weather	-5°C (23°F)	25 mm (1.0 inches)	81%	moderate
March Weather	3°C (38°F)	83 mm (3.3 inches)	71%	high
April Weather	8°C (47°F)	71 mm (2.8 inches)	75%	very high
May Weather	15°C (60°F)	146 mm (5.7 inches)	74%	very high
June Weather	23°C (74°F)	86 mm (3.4 inches)	82%	extreme
July Weather	24°C (76°F)	82 mm (3.2 inches)	84%	very high
August Weather	23°C (73°F)	87 mm (3.4 inches)	82%	very high
September Weather	19°C (67°F)	73 mm (2.9 inches)	75%	very high
October Weather	10°C (50°F)	79 mm (3.1 inches)	72%	high
November Weather	3°C (38°F)	24 mm (0.9 inches)	81%	moderate
December Weather	-2°C (29°F)	44 mm (1.8 inches)	79%	low