December Weather in Bolton, United States

Last updated: June 24, 2025

In Bolton, United States, the average temperature in December hovers around 10°C (51°F). However, temperatures can vary significantly, with a minimum of -6°C (21°F) and a maximum reaching up to 25°C (78°F). During this time, expect approximately 127 mm (5.0 in) of precipitation spread over 9 days, contributing to an average humidity of 86%.

December Temperature in Bolton

In December in Bolton, the average temperature is 10°C (51°F). The maximum can reach 25°C (78°F), while the minimum can drop as low as -6°C (21°F). Be sure to pack layers if you're traveling, as the weather can vary significantly throughout the day.

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

The chart illustrates December temperature patterns in Bolton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bolton, December typically has an average temperature of 10°C (51°F), with highs reaching up to 25°C (78°F) and lows dropping to around -6°C (21°F).

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

December Precipitation in Bolton

In Bolton in December, the precipitation amount is 127 mm (5.0 in) over a span of 9 days.

December Precipitation Trends in Bolton

The chart displays monthly precipitation patterns in Bolton, 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 Bolton, December typically receives around 127 mm (5.0 inches) of precipitation spread over approximately 9 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 Bolton

In Bolton in December humidity is 86%. With an average temperature of 10°C (51°F), this humidity feels like a cool, damp blanket enveloping you, making traveling feel invigorating yet slightly uncomfortable without the right layers.

December Average Humidity in Bolton

This chart illustrates the average monthly humidity levels in Bolton, 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 Bolton is approximately 86%, 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 Bolton

In Bolton 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 Bolton for better planning.

Maximum UV Index Levels in Bolton for December

The chart shows the monthly maximum UV Index (UVI) for Bolton 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 Bolton typically reaches 4, which falls under the moderate exposure category.

Data source: Bolton 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 Bolton Compares to Other Months

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

This table compares monthly weather conditions in Bolton, 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 (48°F)	75 mm (2.9 inches)	85%	moderate
February Weather	12°C (53°F)	89 mm (3.5 inches)	82%	high
March Weather	13°C (56°F)	67 mm (2.6 inches)	81%	very high
April Weather	18°C (64°F)	97 mm (3.8 inches)	80%	very high
May Weather	22°C (72°F)	128 mm (5.0 inches)	81%	extreme
June Weather	25°C (77°F)	166 mm (6.5 inches)	81%	extreme
July Weather	27°C (80°F)	178 mm (7.0 inches)	81%	extreme
August Weather	26°C (80°F)	210 mm (8.3 inches)	80%	very high
September Weather	24°C (76°F)	176 mm (6.9 inches)	79%	very high
October Weather	20°C (68°F)	65 mm (2.6 inches)	80%	very high
November Weather	13°C (55°F)	100 mm (3.9 inches)	85%	high
December Weather	10°C (51°F)	127 mm (5.0 inches)	86%	moderate