December Weather in Devon, United States

Last updated: June 24, 2025

In December, the average temperature in Devon, United States hovers around 4°C (39°F). You'll experience a chill, with minimum temperatures dipping as low as -13°C (10°F), while highs can reach up to 18°C (65°F). Expect 102 mm (4.0 in) of precipitation spread over 10 days, contributing to an average humidity level of 84%. Don't forget your umbrella and a warm coat!

December Temperature in Devon

In December in Devon, the average temperature is 4°C (39°F). Maximums can reach 18°C (65°F) and minimums can be as low as -13°C (10°F). Be prepared for a wide range of temperatures, making packing layers essential for your trip.

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

The chart illustrates December temperature patterns in Devon, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Devon, December typically has an average temperature of 4°C (39°F), with highs reaching up to 18°C (65°F) and lows dropping to around -13°C (10°F).

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

December Precipitation in Devon

In Devon in December, the total precipitation amount is 102 mm (4.0 in) falling over the course of 10 days.

December Precipitation Trends in Devon

The chart displays monthly precipitation patterns in Devon, 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 Devon, December typically receives around 102 mm (4.0 inches) of precipitation spread over approximately 10 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 Devon

In Devon in December, humidity is 84%. With an average temperature of 4°C (39°F), this humidity feels like a damp chill that seeps into your bones, making outdoor excursions uncomfortable and demanding more layers than you anticipate while traveling.

December Average Humidity in Devon

This chart illustrates the average monthly humidity levels in Devon, 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 Devon 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 Devon

In Devon 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 Devon, you can visit Hourly UV Index in Devon.

Maximum UV Index Levels in Devon for December

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

Data source: Devon 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 Devon Compares to Other Months

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

This table compares monthly weather conditions in Devon, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	2°C (35°F)	66 mm (2.6 inches)	84%	moderate
February Weather	3°C (38°F)	108 mm (4.3 inches)	83%	moderate
March Weather	6°C (44°F)	107 mm (4.2 inches)	83%	high
April Weather	12°C (54°F)	108 mm (4.3 inches)	81%	very high
May Weather	18°C (64°F)	139 mm (5.5 inches)	78%	very high
June Weather	23°C (73°F)	115 mm (4.5 inches)	79%	very high
July Weather	26°C (78°F)	144 mm (5.7 inches)	74%	very high
August Weather	24°C (76°F)	152 mm (6.0 inches)	72%	very high
September Weather	21°C (70°F)	103 mm (4.0 inches)	75%	very high
October Weather	16°C (61°F)	104 mm (4.1 inches)	81%	high
November Weather	8°C (46°F)	84 mm (3.3 inches)	85%	moderate
December Weather	4°C (39°F)	102 mm (4.0 inches)	84%	low