December Weather in Derby, United States

Last updated: June 24, 2025

In December, the average temperature in Derby, United States hovers around 4°C (40°F). Expect a chilly minimum of -14°C (8°F), while the mercury might rise to a pleasant 24°C (76°F) on warmer days. Prepare for 30 mm (1.2 in) of precipitation spread over 3 days, with an average humidity of 85% ensuring a distinctly crisp atmosphere.

December Temperature in Derby

In December in Derby, the average temperature is 4°C (40°F), with maximums reaching up to 24°C (76°F) and minimums dropping as low as -14°C (8°F). This makes it essential for travelers to pack layers and be prepared for both chilly and warm conditions.

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

The chart illustrates December temperature patterns in Derby, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Derby, December typically has an average temperature of 4°C (40°F), with highs reaching up to 24°C (76°F) and lows dropping to around -14°C (8°F).

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

December Precipitation in Derby

In Derby in December, the precipitation amount is 30 mm (1.2 in) over the course of 3 days.

December Precipitation Trends in Derby

The chart displays monthly precipitation patterns in Derby, 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 Derby, December typically receives around 30 mm (1.2 inches) of precipitation spread over approximately 3 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 Derby

In Derby in December, humidity is 85%. With an average temperature of 4°C (40°F), this humidity feels like an icy blanket wrapping around you, making outdoor activities feel much colder and damp, which can be quite uncomfortable for traveling.

December Average Humidity in Derby

This chart illustrates the average monthly humidity levels in Derby, 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 Derby is approximately 85%, 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 Derby

In Derby in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Derby, you can check the information here.

Maximum UV Index Levels in Derby for December

The chart shows the monthly maximum UV Index (UVI) for Derby 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 Derby typically reaches 3, which falls under the moderate exposure category.

Data source: Derby 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 Derby Compares to Other Months

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

This table compares monthly weather conditions in Derby, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	1°C (35°F)	40 mm (1.6 inches)	77%	moderate
February Weather	2°C (36°F)	28 mm (1.1 inches)	76%	high
March Weather	10°C (50°F)	82 mm (3.2 inches)	71%	high
April Weather	13°C (56°F)	85 mm (3.4 inches)	73%	very high
May Weather	19°C (67°F)	166 mm (6.5 inches)	83%	very high
June Weather	26°C (78°F)	106 mm (4.2 inches)	83%	extreme
July Weather	27°C (81°F)	67 mm (2.7 inches)	81%	extreme
August Weather	26°C (79°F)	86 mm (3.4 inches)	73%	very high
September Weather	23°C (74°F)	78 mm (3.1 inches)	67%	very high
October Weather	15°C (59°F)	127 mm (5.0 inches)	72%	high
November Weather	8°C (46°F)	27 mm (1.0 inches)	82%	moderate
December Weather	4°C (40°F)	30 mm (1.2 inches)	85%	moderate