December Weather in Ellicott, United States

Last updated: June 24, 2025

In December, the average temperature in Ellicott, United States is a brisk 1°C (33°F). Expect a chilly minimum of -15°C (5°F), while the thermometer can soar to a mild 21°C (69°F) on warmer days. Precipitation is light, with 8 mm (0.3 in) expected over just 2 days, and humidity remains high at 80%, adding to the crisp atmosphere.

December Temperature in Ellicott

In December in Ellicott, the average temperature is 1°C (33°F), with maximums reaching up to 21°C (69°F) and minimums dropping as low as -15°C (5°F). Be prepared for a wide range of temperatures during your visit, making layering essential for comfort while exploring.

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

The chart illustrates December temperature patterns in Ellicott, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ellicott, December typically has an average temperature of 1°C (33°F), with highs reaching up to 21°C (69°F) and lows dropping to around -15°C (5°F).

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

December Precipitation in Ellicott

In Ellicott in December, the precipitation amount is 8 mm (0.3 in) over the course of 2 days.

December Precipitation Trends in Ellicott

The chart displays monthly precipitation patterns in Ellicott, 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 Ellicott, December typically receives around 8 mm (0.3 inches) of precipitation spread over approximately 2 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 Ellicott

In Ellicott in December, humidity is 80%. With an average temperature of 1°C (33°F), this humidity feels like a damp chill that seeps into your bones, making travel outdoors an invigorating yet biting experience.

December Average Humidity in Ellicott

This chart illustrates the average monthly humidity levels in Ellicott, 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 Ellicott is approximately 80%, 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 Ellicott

In Ellicott 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 Ellicott, you can check the information here.

Maximum UV Index Levels in Ellicott for December

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

Data source: Ellicott 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 Ellicott Compares to Other Months

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

This table compares monthly weather conditions in Ellicott, 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 (31°F)	12 mm (0.5 inches)	74%	moderate
February Weather	-1°C (30°F)	16 mm (0.6 inches)	75%	high
March Weather	5°C (41°F)	42 mm (1.6 inches)	66%	very high
April Weather	9°C (48°F)	33 mm (1.3 inches)	62%	extreme
May Weather	14°C (57°F)	59 mm (2.3 inches)	74%	extreme
June Weather	21°C (70°F)	30 mm (1.2 inches)	76%	extreme
July Weather	23°C (74°F)	63 mm (2.5 inches)	75%	extreme
August Weather	22°C (72°F)	39 mm (1.5 inches)	80%	extreme
September Weather	19°C (66°F)	22 mm (0.9 inches)	79%	very high
October Weather	10°C (49°F)	28 mm (1.1 inches)	77%	high
November Weather	4°C (40°F)	13 mm (0.5 inches)	74%	moderate
December Weather	1°C (33°F)	8 mm (0.3 inches)	80%	moderate