December Weather in Byron, United States

Last updated: June 24, 2025

In Byron, United States, the average temperature in December hovers around 11°C (51°F). Expect to experience a wide temperature range, with minimums dipping to -5°C (22°F) and maximums soaring up to 26°C (80°F). During this month, precipitation averages 118 mm (4.6 in) over approximately 10 days, while humidity remains high at an average of 89%.

December Temperature in Byron

In December in Byron, the average temperature is 11°C (51°F), with maximums reaching 26°C (80°F) and minimums dropping as low as -5°C (22°F). Be sure to pack for a range of weather conditions to fully enjoy your visit.

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 11°C (51°F), with highs reaching up to 26°C (80°F) and lows dropping to around -5°C (22°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 total precipitation amount is 118 mm (4.6 in) over a span of 10 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 118 mm (4.6 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 Byron

In Byron in December, humidity is 89%. With an average temperature of 11°C (51°F), this humidity feels like a heavy blanket wrapping around you, making every step feel sluggish and every breath a little more laborious, creating a challenging environment for travelers.

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 89%, 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 reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Byron for better planning.

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 4, which falls under the moderate 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	9°C (49°F)	108 mm (4.3 inches)	86%	moderate
February Weather	13°C (55°F)	121 mm (4.8 inches)	84%	high
March Weather	15°C (60°F)	80 mm (3.1 inches)	83%	very high
April Weather	19°C (66°F)	94 mm (3.7 inches)	81%	very high
May Weather	23°C (75°F)	86 mm (3.4 inches)	81%	extreme
June Weather	26°C (79°F)	120 mm (4.7 inches)	81%	extreme
July Weather	28°C (82°F)	97 mm (3.8 inches)	83%	extreme
August Weather	27°C (81°F)	112 mm (4.4 inches)	81%	extreme
September Weather	26°C (78°F)	98 mm (3.9 inches)	82%	very high
October Weather	21°C (70°F)	94 mm (3.7 inches)	78%	very high
November Weather	13°C (56°F)	76 mm (3.0 inches)	86%	high
December Weather	11°C (51°F)	118 mm (4.6 inches)	89%	moderate