December Weather in Willow, United States

Last updated: June 24, 2025

In December, the average temperature in Willow, United States hovers around -8°C (17°F), with extremes ranging from a chilling -29°C (-20°F) to a mild 8°C (46°F). Expect 74 mm (2.9 in) of precipitation over approximately 16 days, resulting in a notably high average humidity of 98%. Stay warm and prepared for this wintry weather!

December Temperature in Willow

In December in Willow, the average temperature is -8°C (17°F). Maximums can reach 8°C (46°F), while minimums can drop as low as -29°C (-20°F). Travelers should be prepared for cold conditions and pack accordingly to enjoy their visit to Willow.

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

The chart illustrates December temperature patterns in Willow, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Willow, December typically has an average temperature of -8°C (17°F), with highs reaching up to 8°C (46°F) and lows dropping to around -29°C (-20°F).

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

December Precipitation in Willow

In Willow in December, the total precipitation amount is 74 mm (2.9 in) spread over 16 days.

December Precipitation Trends in Willow

The chart displays monthly precipitation patterns in Willow, 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 Willow, December typically receives around 74 mm (2.9 inches) of precipitation spread over approximately 16 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 Willow

In Willow in December, humidity is 98%. With an average temperature of -8°C (17°F), this humidity feels like an unrelenting chill that seeps into your bones, making outdoor excursions feel significantly more uncomfortable and requiring layers of clothing just to keep warm.

December Average Humidity in Willow

This chart illustrates the average monthly humidity levels in Willow, 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 Willow is approximately 98%, 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 Willow

In Willow in December, the maximum UV index is 1, which corresponds to a low Exposure Category. This means you have a time to burn of 45 minutes. For more details, you can check the Hourly UV Index in Willow.

Maximum UV Index Levels in Willow for December

The chart shows the monthly maximum UV Index (UVI) for Willow 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 Willow typically reaches 1, which falls under the low exposure category.

Data source: Willow 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 Willow Compares to Other Months

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

This table compares monthly weather conditions in Willow, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-12°C (10°F)	36 mm (1.4 inches)	95%	low
February Weather	-9°C (16°F)	48 mm (1.9 inches)	95%	low
March Weather	-6°C (22°F)	41 mm (1.6 inches)	90%	moderate
April Weather	2°C (36°F)	40 mm (1.6 inches)	82%	moderate
May Weather	9°C (49°F)	79 mm (3.1 inches)	85%	moderate
June Weather	14°C (57°F)	80 mm (3.2 inches)	95%	high
July Weather	16°C (62°F)	86 mm (3.4 inches)	100%	high
August Weather	14°C (58°F)	134 mm (5.3 inches)	99%	moderate
September Weather	9°C (49°F)	107 mm (4.2 inches)	97%	moderate
October Weather	3°C (37°F)	110 mm (4.3 inches)	93%	low
November Weather	-6°C (21°F)	67 mm (2.6 inches)	97%	low
December Weather	-8°C (17°F)	74 mm (2.9 inches)	98%	low