December Weather in Swansea, Australia

Last updated: August 22, 2025

In Swansea, Australia, the average temperature in December hovers around 15°C (60°F), with extremes ranging from a chilly 5°C (41°F) to a warm 35°C (96°F). Expect about 72 mm (2.8 in) of precipitation spread over 10 days, while the air maintains an average humidity of 76%. It's a month of contrasts, where you can experience the freshness of spring alongside bursts of warmth!

December Temperature in Swansea

In December in Swansea, the average temperature is 15°C (60°F). Maximums can reach 35°C (96°F), while minimums can drop as low as 5°C (41°F). This makes it advisable for travelers to pack layers to accommodate both warm and cooler temperatures.

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

The chart illustrates December temperature patterns in Swansea, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Swansea, December typically has an average temperature of 15°C (60°F), with highs reaching up to 35°C (96°F) and lows dropping to around 5°C (41°F).

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

December Precipitation in Swansea

In Swansea in December, the total precipitation amount is 72 mm (2.8 in) spread over a duration of 10 days.

December Precipitation Trends in Swansea

The chart displays monthly precipitation patterns in Swansea, 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 Swansea, December typically receives around 72 mm (2.8 inches) of precipitation spread over approximately 10 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 Swansea

In Swansea in December humidity is 76%. With an average temperature of 15°C (60°F), this humidity feels like a warm, damp blanket wrapping around you, making outdoor activities a bit more challenging and urging you to stay hydrated while exploring the area.

December Average Humidity in Swansea

This chart illustrates the average monthly humidity levels in Swansea, 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 Swansea is approximately 76%, 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 Swansea

In Swansea in December, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in Swansea.

Maximum UV Index Levels in Swansea for December

The chart shows the monthly maximum UV Index (UVI) for Swansea 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 Swansea typically reaches 13, which falls under the extreme exposure category.

Data source: Swansea 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 Swansea Compares to Other Months

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

This table compares monthly weather conditions in Swansea, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	17°C (63°F)	60 mm (2.4 inches)	76%	extreme
February Weather	16°C (60°F)	59 mm (2.3 inches)	73%	extreme
March Weather	15°C (60°F)	66 mm (2.6 inches)	77%	very high
April Weather	12°C (55°F)	37 mm (1.5 inches)	78%	high
May Weather	10°C (51°F)	45 mm (1.8 inches)	80%	moderate
June Weather	8°C (47°F)	54 mm (2.1 inches)	79%	low
July Weather	7°C (46°F)	25 mm (1.0 inches)	80%	low
August Weather	8°C (46°F)	48 mm (1.9 inches)	79%	moderate
September Weather	9°C (49°F)	44 mm (1.7 inches)	77%	high
October Weather	11°C (53°F)	88 mm (3.4 inches)	75%	very high
November Weather	14°C (57°F)	67 mm (2.7 inches)	76%	very high
December Weather	15°C (60°F)	72 mm (2.8 inches)	76%	extreme