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December Weather in Highland, United States

Last updated: June 24, 2025

In December, the average temperature in Highland, United States hovers around 4°C (39°F). Expect a chilly minimum of -18°C (0°F) and a pleasant maximum reaching 21°C (71°F). During this month, 66 mm (2.6 in) of precipitation is recorded over 8 days, while relative humidity remains high at an average of 87%.

December Temperature in Highland

In December in Highland, the average temperature is 4°C (39°F), with maximums reaching 21°C (71°F) and minimums dropping as low as -18°C (0°F). Visitors should be prepared for a wide temperature range, making layered clothing essential for exploring the area.

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 4°C (39°F), with highs reaching up to 21°C (71°F) and lows dropping to around -18°C (0°F).
JanFebMarAprMayJunJulAugSepOctNovDec323647556877807673594439
Data source: Temperature data for Highland generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Highland

In Highland in December, the total precipitation amount is 66 mm (2.6 in) over the course of 8 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 66 mm (2.6 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec818313914316710696120591057766
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Highland

In Highland in December, humidity is 87%. With an average temperature of 4°C (39°F), this humidity feels like a damp chill that seeps into your bones, making travel uncomfortable and gritty, as the air hangs heavy and clings to your skin.

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 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%82%84%83%80%83%82%83%79%79%88%87%
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 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 Highland, you can check the information here.

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 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910111099653
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.
 TemperaturePrecipitationHumidityUV
January Weather0°C (33°F)80 mm (3.2 inches)84%moderate
February Weather2°C (36°F)83 mm (3.3 inches)82%moderate
March Weather8°C (47°F)139 mm (5.5 inches)84%high
April Weather13°C (56°F)143 mm (5.6 inches)83%very high
May Weather20°C (68°F)166 mm (6.6 inches)80%very high
June Weather25°C (77°F)106 mm (4.2 inches)83%extreme
July Weather26°C (80°F)96 mm (3.8 inches)82%very high
August Weather25°C (77°F)120 mm (4.7 inches)82%very high
September Weather23°C (73°F)59 mm (2.3 inches)79%very high
October Weather15°C (60°F)105 mm (4.1 inches)79%high
November Weather7°C (44°F)77 mm (3.0 inches)88%moderate
December Weather4°C (39°F)66 mm (2.6 inches)87%moderate

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