December Weather in Glasgow, United States

Last updated: June 24, 2025

In December, the average temperature in Glasgow, United States hovers around -6°C (21°F), with extremes ranging from a biting -35°C (-30°F) to a surprisingly mild 19°C (67°F). Expect a modest 19 mm (0.7 in) of precipitation over about 4 days, accompanied by high humidity averaging 91%. Prepare accordingly!

December Temperature in Glasgow

In December in Glasgow, the average temperature is -6°C (21°F), with a maximum reaching 19°C (67°F) and a minimum dipping as low as -35°C (-30°F). Be prepared for a wide range of temperatures when traveling to Glasgow during this time.

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

The chart illustrates December temperature patterns in Glasgow, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Glasgow, December typically has an average temperature of -6°C (21°F), with highs reaching up to 19°C (67°F) and lows dropping to around -35°C (-30°F).

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

December Precipitation in Glasgow

In Glasgow in December, the precipitation amount is 19 mm (0.7 in) over the course of 4 days.

December Precipitation Trends in Glasgow

The chart displays monthly precipitation patterns in Glasgow, 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 Glasgow, December typically receives around 19 mm (0.7 inches) of precipitation spread over approximately 4 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 Glasgow

In Glasgow in December humidity is 91%. With an average temperature of -6°C (21°F), this humidity feels like wandering through a cold, damp fog that clings to your skin, making it challenging to stay warm and comfortable while exploring the surroundings.

December Average Humidity in Glasgow

This chart illustrates the average monthly humidity levels in Glasgow, 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 Glasgow is approximately 91%, 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 Glasgow

In Glasgow in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Glasgow, you can visit Hourly UV Index in Glasgow.

Maximum UV Index Levels in Glasgow for December

The chart shows the monthly maximum UV Index (UVI) for Glasgow 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 Glasgow typically reaches 2, which falls under the low exposure category.

Data source: Glasgow 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 Glasgow Compares to Other Months

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

This table compares monthly weather conditions in Glasgow, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-8°C (18°F)	9 mm (0.4 inches)	88%	low
February Weather	-11°C (13°F)	24 mm (0.9 inches)	91%	moderate
March Weather	-1°C (30°F)	22 mm (0.9 inches)	84%	moderate
April Weather	5°C (42°F)	24 mm (0.9 inches)	71%	high
May Weather	13°C (56°F)	36 mm (1.4 inches)	74%	very high
June Weather	19°C (67°F)	57 mm (2.3 inches)	70%	very high
July Weather	23°C (75°F)	24 mm (0.9 inches)	76%	very high
August Weather	22°C (71°F)	34 mm (1.3 inches)	74%	very high
September Weather	15°C (59°F)	54 mm (2.1 inches)	64%	high
October Weather	6°C (43°F)	22 mm (0.9 inches)	69%	moderate
November Weather	-1°C (31°F)	24 mm (1.0 inches)	82%	moderate
December Weather	-6°C (21°F)	19 mm (0.7 inches)	91%	low