December Weather in Willits, United States

Last updated: June 24, 2025

In December, the average temperature in Willits, United States hovers around 6°C (44°F), providing a crisp yet invigorating atmosphere. Expect temperatures to range from a chilly -4°C (26°F) at the lowest to a warmer 21°C (71°F) at the peak. With 132 mm (5.2 in) of precipitation falling over 11 days, be prepared for some rainy moments. The average humidity sits at a substantial 84%, enhancing the overall freshness of the air.

December Temperature in Willits

In December in Willits, the average temperature is 6°C (44°F). The maximum can reach 21°C (71°F), while the minimum can drop as low as -4°C (26°F). Be prepared for a wide range of temperatures, making it essential to pack layers for your travels.

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

The chart illustrates December temperature patterns in Willits, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Willits, December typically has an average temperature of 6°C (44°F), with highs reaching up to 21°C (71°F) and lows dropping to around -4°C (26°F).

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

December Precipitation in Willits

In Willits in December, the precipitation amount is 132 mm (5.2 in), which occurs over a span of 11 days.

December Precipitation Trends in Willits

The chart displays monthly precipitation patterns in Willits, 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 Willits, December typically receives around 132 mm (5.2 inches) of precipitation spread over approximately 11 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 Willits

In Willits in December humidity is 84%. With an average temperature of 6°C (44°F), this humidity feels like a chilly dampness that clings to your skin, making outdoor activities less comfortable and necessitating layered clothing to stay warm and dry while exploring the area.

December Average Humidity in Willits

This chart illustrates the average monthly humidity levels in Willits, 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 Willits is approximately 84%, 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 Willits

In Willits in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Willits, you can check the information here.

Maximum UV Index Levels in Willits for December

The chart shows the monthly maximum UV Index (UVI) for Willits 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 Willits typically reaches 3, which falls under the moderate exposure category.

Data source: Willits 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 Willits Compares to Other Months

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

This table compares monthly weather conditions in Willits, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	6°C (44°F)	195 mm (7.7 inches)	86%	moderate
February Weather	7°C (45°F)	193 mm (7.6 inches)	84%	moderate
March Weather	8°C (47°F)	147 mm (5.8 inches)	83%	high
April Weather	11°C (52°F)	86 mm (3.4 inches)	80%	very high
May Weather	14°C (58°F)	59 mm (2.3 inches)	80%	extreme
June Weather	19°C (66°F)	5 mm (0.2 inches)	76%	extreme
July Weather	22°C (73°F)	1 mm (0.0 inches)	70%	extreme
August Weather	22°C (72°F)	2 mm (0.1 inches)	66%	extreme
September Weather	19°C (66°F)	11 mm (0.4 inches)	68%	very high
October Weather	15°C (58°F)	61 mm (2.4 inches)	72%	high
November Weather	10°C (50°F)	108 mm (4.3 inches)	84%	moderate
December Weather	6°C (44°F)	132 mm (5.2 inches)	84%	moderate