December Weather in Byron, United States

Last updated: June 24, 2025

In December, the average temperature in Byron, United States hovers around -4°C (26°F), with extremes ranging from a chilly -26°C (-15°F) to a milder 16°C (61°F). Expect 16 mm (0.6 in) of precipitation over 4 days, contributing to an average humidity of 87%. Be prepared for a brisk month!

December Temperature in Byron

In December in Byron, the average temperature is -4°C (26°F). Maximum temperatures can reach 16°C (61°F), while the minimum can drop as low as -26°C (-15°F). Be prepared for a wide range of temperatures and dress accordingly for your travels.

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

The chart illustrates December temperature patterns in Byron, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Byron, December typically has an average temperature of -4°C (26°F), with highs reaching up to 16°C (61°F) and lows dropping to around -26°C (-15°F).

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

December Precipitation in Byron

In Byron in December, the precipitation amount is 16 mm (0.6 in) over a span of 4 days.

December Precipitation Trends in Byron

The chart displays monthly precipitation patterns in Byron, 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 Byron, December typically receives around 16 mm (0.6 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 Byron

In Byron in December humidity is 87%. With average temperature -4°C (26°F), this humidity feels like an icy blanket enveloping you, making outdoor activities challenging and rendering those brisk air moments difficult to bear, as the cold moisture seeps into your clothing and chills you to the bone.

December Average Humidity in Byron

This chart illustrates the average monthly humidity levels in Byron, 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 Byron is approximately 87%, 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 Byron

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

Maximum UV Index Levels in Byron for December

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

Data source: Byron 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 Byron Compares to Other Months

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

This table compares monthly weather conditions in Byron, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-4°C (24°F)	11 mm (0.4 inches)	85%	moderate
February Weather	-7°C (20°F)	26 mm (1.0 inches)	85%	moderate
March Weather	3°C (37°F)	17 mm (0.7 inches)	79%	high
April Weather	6°C (43°F)	40 mm (1.6 inches)	74%	very high
May Weather	12°C (53°F)	53 mm (2.1 inches)	76%	very high
June Weather	18°C (65°F)	36 mm (1.4 inches)	79%	extreme
July Weather	23°C (74°F)	16 mm (0.6 inches)	81%	extreme
August Weather	21°C (70°F)	16 mm (0.6 inches)	80%	very high
September Weather	16°C (60°F)	34 mm (1.4 inches)	76%	very high
October Weather	6°C (43°F)	33 mm (1.3 inches)	74%	high
November Weather	1°C (34°F)	17 mm (0.7 inches)	81%	moderate
December Weather	-4°C (26°F)	16 mm (0.6 inches)	87%	low