December Weather in Chester, United States

Last updated: June 24, 2025

In Chester, United States, the average temperature in December hovers around 11°C (52°F), with potential extremes ranging from a brisk -5°C (24°F) to a warm 26°C (79°F). This month also brings 121 mm (4.7 in) of precipitation over approximately 10 days, contributing to a notably high average humidity of 89%.

December Temperature in Chester

In December in Chester, the average temperature is 11°C (52°F). Maximum temperatures can reach 26°C (79°F), while the minimum can dip as low as -5°C (24°F). Therefore, it's advisable to pack layers to stay comfortable throughout the day.

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

The chart illustrates December temperature patterns in Chester, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Chester, December typically has an average temperature of 11°C (52°F), with highs reaching up to 26°C (79°F) and lows dropping to around -5°C (24°F).

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

December Precipitation in Chester

In Chester in December, the precipitation amount is 121 mm (4.7 in) over a span of 10 days.

December Precipitation Trends in Chester

The chart displays monthly precipitation patterns in Chester, 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 Chester, December typically receives around 121 mm (4.7 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 Chester

In Chester in December humidity is 89%. With an average temperature of 11°C (52°F), this humidity feels like a cool mist clinging to your skin, making outdoor activities feel damp and chilly, so it's essential to dress in layers and be prepared for a brisk experience while traveling.

December Average Humidity in Chester

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

In Chester 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 Chester for better planning.

Maximum UV Index Levels in Chester for December

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

Data source: Chester 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 Chester Compares to Other Months

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

This table compares monthly weather conditions in Chester, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	10°C (50°F)	96 mm (3.8 inches)	86%	moderate
February Weather	13°C (56°F)	117 mm (4.6 inches)	84%	high
March Weather	16°C (61°F)	78 mm (3.1 inches)	83%	very high
April Weather	19°C (67°F)	92 mm (3.6 inches)	81%	very high
May Weather	24°C (76°F)	83 mm (3.3 inches)	81%	extreme
June Weather	27°C (80°F)	105 mm (4.1 inches)	81%	extreme
July Weather	28°C (83°F)	100 mm (3.9 inches)	83%	extreme
August Weather	28°C (83°F)	92 mm (3.6 inches)	81%	extreme
September Weather	26°C (79°F)	107 mm (4.2 inches)	82%	very high
October Weather	21°C (71°F)	93 mm (3.7 inches)	78%	very high
November Weather	14°C (57°F)	65 mm (2.6 inches)	86%	high
December Weather	11°C (52°F)	121 mm (4.7 inches)	89%	moderate