December Weather in Highland, United States

Last updated: June 24, 2025

In December, the average temperature in Highland, United States hovers around 9°C (49°F). Expect a minimum of -4°C (25°F) and a pleasant maximum of 24°C (76°F). Throughout the month, anticipate approximately 56 mm (2.2 in) of precipitation spread over 5 days. With an average humidity level of 75%, it’s wise to prepare for a mix of cool and damp weather.

December Temperature in Highland

In December in Highland, the average temperature is 9°C (49°F). The maximum can reach 24°C (76°F), and the minimum can be as low as -4°C (25°F). This mix of temperatures makes it essential for travelers to pack layers to accommodate varying conditions.

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

The chart illustrates December temperature patterns in Highland, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Highland, December typically has an average temperature of 9°C (49°F), with highs reaching up to 24°C (76°F) and lows dropping to around -4°C (25°F).

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

December Precipitation in Highland

In Highland in December, the precipitation amount is 56 mm (2.2 in) over a period of 5 days.

December Precipitation Trends in Highland

The chart displays monthly precipitation patterns in Highland, 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 Highland, December typically receives around 56 mm (2.2 inches) of precipitation spread over approximately 5 days.

Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

December Humidity in Highland

In Highland in December, humidity is 75%. With an average temperature of 9°C (49°F), this humidity feels like a damp chill that wraps around you, making outdoor activities uncomfortable and causing your clothes to cling uncomfortably. It's advisable to dress in layers to stay warm, while also being prepared for the persistent moisture in the air that can leave you feeling a bit sluggish throughout your travels.

December Average Humidity in Highland

This chart illustrates the average monthly humidity levels in Highland, 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 Highland is approximately 75%, 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 Highland

In Highland 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 Highland for better planning.

Maximum UV Index Levels in Highland for December

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

Data source: Highland 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 Highland Compares to Other Months

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

This table compares monthly weather conditions in Highland, 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)	51 mm (2.0 inches)	76%	moderate
February Weather	9°C (49°F)	56 mm (2.2 inches)	80%	high
March Weather	11°C (52°F)	52 mm (2.1 inches)	69%	very high
April Weather	15°C (60°F)	24 mm (0.9 inches)	57%	extreme
May Weather	17°C (64°F)	13 mm (0.5 inches)	45%	extreme
June Weather	23°C (73°F)	4 mm (0.1 inches)	34%	extreme
July Weather	26°C (79°F)	12 mm (0.5 inches)	29%	extreme
August Weather	26°C (79°F)	11 mm (0.4 inches)	28%	extreme
September Weather	23°C (74°F)	9 mm (0.4 inches)	41%	very high
October Weather	18°C (65°F)	8 mm (0.3 inches)	54%	very high
November Weather	14°C (57°F)	19 mm (0.8 inches)	68%	moderate
December Weather	9°C (49°F)	56 mm (2.2 inches)	75%	moderate